How often should I clean my laptop in South Africa?

Exterior wipe-down weekly. Keyboard and screen monthly. Internal fan and heatsink cleanout every 3 months in SA's dusty climate (versus the 6-12 months often recommended elsewhere). Highveld dust, coastal salt and Cape Town wind-blown grit all accelerate dust accumulation. If fan noise has noticeably increased or thermal throttling kicks in during normal tasks, you're overdue.

What ratio of isopropyl alcohol should I use?

70% to 99% isopropyl alcohol (IPA). 70% is the everyday cleaning standard — sufficient to clean and disinfect without damage. 99% IPA evaporates faster and leaves zero residue, ideal for sensitive electronics like circuit boards or thermal paste cleanup. Below 70% IPA contains too much water and can leave moisture; above 99% there's no advantage for cleaning surfaces. Never use methylated spirits or denatured alcohol — additives leave residue.

Should I power off the laptop before cleaning?

Yes — fully power off (Shift+Restart on Windows, full shutdown not sleep) and disconnect the charger. Sleep mode keeps voltage live on components. For internal cleaning, disconnect the battery if your laptop allows it (most ultrabooks require unscrewing the bottom panel). The few seconds of disconnect protocol prevents short-circuit damage if compressed air or cleaning fluid touches a live component.

How do I clean a laptop screen without damaging it?

70% isopropyl on a microfibre cloth (apply IPA to the cloth, not the screen). Wipe in straight lines, not circles. Don't press hard — modern OLED and LCD coatings scratch under firm pressure. Avoid Windex, ammonia-based cleaners and paper towels (the wood pulp scratches anti-reflective coatings). A dedicated screen cleaner spray (like Whoosh!) plus microfibre is foolproof for those uncomfortable with IPA.

Is compressed air safe for laptops?

Yes, with technique. Hold the can upright (tipping releases liquid propellant which can damage components). Use short controlled bursts, not sustained spray. Keep the nozzle 5-10cm from components. Crucially: hold the fans still with a toothpick or your finger while blasting air through the heatsink — letting the fan spin freely from compressed air can over-spin the motor and damage it. Most warranty issues we see from cleaning relate to over-spun fans.

How do I clean dust out of the heatsink without taking the laptop apart?

Vacuum-assisted method: place a small vacuum cleaner (or shop-vac with reduced suction) at the exhaust grille while puffing short compressed-air bursts into the intake. Dust gets sucked out instead of pushed deeper into the laptop. Skip blowing alone — it just relocates dust further inside. For thorough cleaning every 2-3 years, removing the bottom panel and accessing the heatsink directly is worth the effort.

What should I never use to clean a laptop?

Window cleaner (Windex, ammonia damages anti-glare coatings). Paper towels (wood fibres scratch screens and create static). Soaking-wet cloths (moisture seeps into keyboard and ports). Methylated spirits or denatured alcohol (leaves residue). Acetone, nail polish remover, lacquer thinner (dissolves plastic and rubber). A cloth that's been used with chemicals or detergent on other surfaces. Bleach. Anything labelled 'multi-surface cleaner' — these almost always have detergents that leave residue.

When should I repaste the CPU thermal paste on a laptop?

Every 3-4 years, or when temperatures climb 10°C+ above factory baseline at the same workload, or after disassembly for any reason. Modern laptop pastes don't dry out the way old silicone pastes did — proper carbon-based paste (Arctic MX-6, Thermal Grizzly Kryonaut) holds for years. Repasting a laptop is a real intermediate-level repair: removing the heatsink, cleaning old paste with IPA, applying a new pea-sized dot, remounting with even pressure. Document the screw locations carefully — laptop screws vary by length and the wrong screw in the wrong hole damages the chassis.

Laptop Maintenance Guide

How to clean your laptop properly.

Most laptop "deaths" in SA are slow thermal strangulation by dust, not catastrophic failure. Quarterly cleanouts add years to a thermal-limited machine. Here's the technique that doesn't void warranties or over-spin fans.

8 min read
Updated June 2026
Reviewed by Evetech Service Team

By the end of this guide, you'll know the right ratio, the right tools, the technique that protects fan motors, and which household products will quietly destroy your screen.

IPA ratio: 70-99%
SA cleanout: 3 months
basic clean: 15 min

Power off + disconnect battery

Before any cleaning beyond an exterior wipe-down, fully power off the laptop — Shift+Restart on Windows for a clean shutdown, not Sleep. Disconnect the AC charger. For internal cleaning, disconnect the battery (most modern ultrabooks require unscrewing the bottom panel; older laptops often have a removable battery pack).

Why this matters: Sleep mode keeps voltage live on components. A drop of cleaning fluid on a powered component or a fan over-spun by compressed air on a live system can short circuits permanently. The 30 seconds spent disconnecting protects an R20,000–R40,000 laptop from preventable damage.

Lay the laptop on a soft, non-static surface — a microfibre cloth on a wooden desk works. Avoid carpet (static buildup) and steel benches (scratching). Have your tools laid out within reach so you're not fumbling with the laptop open.

Screen — IPA, microfibre, no pressure

Modern laptop screens (matt IPS, OLED, MiniLED) have anti-reflective coatings that scratch easily under firm pressure or abrasive material. The right approach is gentle but effective:

70% isopropyl alcohol on a clean microfibre cloth — apply to the cloth, never spray the screen directly.
Wipe in straight lines from one edge to the other, then turn the cloth and do the next strip. Don't use circular motions — they smear and trap residue.
Light pressure only. If the cloth isn't picking up dirt at light pressure, the cloth is dirty — flip it or get a fresh one. Don't press harder.
Wait 30 seconds for the IPA to fully evaporate before closing the laptop or powering on.

Alternative — dedicated screen cleaner. Whoosh!, iKlear, BinkleyKid, or LCDClean spray plus microfibre is foolproof for those uncomfortable with IPA. R150–R250 in SA for a bottle that lasts a year.

Keyboard — pry, brush, IPA on cloth

Laptop keyboards collect skin oils, dust and the occasional crumb. Two methods, depending on how deep the clean:

Surface cleaning (monthly):

Turn the laptop upside down with the screen at 90° (so the keyboard faces down). Tap gently on the back to dislodge loose particles.
Use a soft brush (a 5mm to 10mm artist's brush, or a dedicated keyboard cleaning brush) to flick particles out from between keys.
Wipe across the keys with a microfibre cloth lightly dampened with 70% IPA. The IPA dissolves skin oils that water-only cloths can't lift.

Deeper cleaning (quarterly):

Use short compressed-air bursts between rows of keys to displace deeper dust. Keep the can upright — tilted cans release liquid propellant which can damage components.
For desktop mechanical keyboards (not laptop): individual keycaps can be pried with a keycap puller for thorough cleaning. Do NOT pry laptop keys — modern laptop keycaps clip into delicate scissor mechanisms that break under prying force.
If a key is sticky from spilled liquid: a tiny drop of IPA applied with a cotton swab between adjacent keys, worked in by repeatedly pressing the key, often resolves it without disassembly.

Fans & heatsink — the real performance gain

This is where laptop cleaning genuinely earns its keep. Dust accumulating on heatsink fins is the #1 cause of thermal throttling in 2–4 year old SA laptops. A 15-minute cleanout can drop temperatures 10–15°C and add years of useful life.

Method 1: External (no disassembly)

Place a small vacuum cleaner (or shop-vac with reduced suction) at the exhaust grille.
Puff short compressed-air bursts into the intake grilles (usually the bottom or sides).
Critically: hold the fan blades stationary with a toothpick or wooden skewer pushed through the grille while you blow air. Free-spinning the fans from compressed air over-spins the motor beyond its rated RPM and damages the bearings.
Repeat 3–5 cycles until the dust extracted at the vacuum end drops to near zero.

Method 2: Bottom panel removal (every 2-3 years, deeper clean)

Look up your laptop's service manual or iFixit guide for the exact bottom panel screw pattern. Photograph every screw position.
Use a precision screwdriver set (most laptops use Torx T5 or Phillips #00) — wrong driver shape strips screws and turns a 30-minute job into a 3-hour disaster.
With the bottom panel off, use compressed air at close range on the heatsink fins, fan housing and intake mesh. Direct the dust outward, away from other components.
Wipe the fan blades with a microfibre cloth lightly dampened with IPA — the oily film that builds up there is part of why fan noise increases over time.
Reassemble: every screw back in its exact original position. Laptop screws vary by length and the wrong screw in the wrong hole damages the chassis.

Thermal paste — check, sometimes refresh

If you've already opened the bottom panel and the laptop is 3+ years old, this is the right time to evaluate the CPU/GPU thermal paste. Don't repaste a brand-new or under-warranty laptop — opening the heatsink usually voids warranty and the factory paste is fine for the warranty period.

Signs the paste needs refreshing:

CPU temperatures running 10°C+ above factory baseline at the same workload (use HWMonitor or HWiNFO to track).
Thermal throttling during basic tasks (Word, browser tabs) when it didn't before.
Laptop now 3+ years old AND used in dusty environment AND being kept rather than replaced.

If repasting:

Unscrew the heatsink — screw order matters. Most laptops indicate the tightening order with numbers (1-2-3-4); unscrew in reverse.
Gently lift the heatsink straight up. If it's stuck, the old paste has bonded — twist very gently to break the seal, never pry.
Clean both CPU/GPU die and heatsink cold plate with 99% IPA on a lint-free cloth. Wipe in straight lines, repeat until cloth comes away clean.
Apply a small pea-sized dot of fresh paste (Arctic MX-6, Thermal Grizzly Kryonaut, Noctua NT-H2) to the centre of each die. For laptops with multiple dies under one heatsink (CPU + GPU), small dots on each.
Lower the heatsink straight down. Tighten screws in factory order (1-2-3-4), with cross-pattern tightening to seat evenly.

Recovery: 5–15°C cooler at the same workload, less fan noise, reduced thermal throttling. Worth 30–45 minutes of careful work for a laptop you intend to keep another 2–3 years.

Exterior wipe-down — discipline beats deep clean

The most cost-effective cleaning routine is regular, light exterior maintenance — not occasional deep cleans.

Weekly: microfibre cloth + small spray of 70% IPA, wipe down lid, palmrest, trackpad. Takes 60 seconds. Removes skin oils that otherwise build into stubborn film.

Monthly: add screen wipe-down and keyboard surface clean (above). 5 minutes total.

Quarterly (SA standard): add external fan cleanout (Method 1 above). 15–20 minutes. Drops temps, extends laptop life.

Every 2–3 years: bottom-panel deep clean and thermal paste check (Method 2). 30–60 minutes. Only if confident with screwdrivers.

What NOT to use — common destroyers

More laptops are damaged by wrong cleaning products than by neglect. The list of things to keep away:

Don't use	What it damages	Use instead
Windex / window cleaner	Anti-reflective coating, plastic bezels	70% IPA + microfibre
Paper towel / kitchen roll	Scratches screen, anti-glare layer	Microfibre cloth
Methylated spirits	Leaves residue (denatured with additives)	Isopropyl alcohol (IPA)
Soaking-wet cloth	Moisture seepage into keyboard, ports	Lightly damp microfibre
Acetone, nail polish remover	Dissolves plastic, rubber, paint	IPA
Multi-surface household cleaner	Detergent residue, coating damage	Dedicated screen cleaner or IPA
Bleach	Discolouration, corrosion	Never bleach electronics
Domestic vacuum at full power	Static damage to components	Compressed air + reduced-suction vacuum
Tilted compressed air can	Liquid propellant on components	Always keep can upright

Key takeaways

Power off + disconnect AC + ground yourself before any internal work. Don't clean with the system live.
70-99% isopropyl alcohol on a microfibre cloth — apply IPA to cloth, never directly to screen.
Compressed air: keep can upright, hold fan blades stationary, vacuum-extract dust at exhaust.
Quarterly external clean for SA dust. Every 2–3 years internal with paste refresh if 3+ years old.
Never use Windex, paper towel, methylated spirits, multi-surface cleaner, or a tilted air can.

Frequently asked questions

How often should I clean my laptop in South Africa?
Weekly exterior wipe, monthly keyboard + screen, quarterly internal fan cleanout. SA's dust climate accelerates accumulation versus the annual schedule recommended in Northern Hemisphere guides.
What ratio of isopropyl alcohol should I use?
70% for routine cleaning, 99% for sensitive electronics like circuit boards or thermal paste cleanup. Below 70% IPA contains too much water. Never use methylated spirits — additives leave residue.
Should I power off the laptop before cleaning?
Yes — fully shut down, disconnect AC, and (for internal work) disconnect the battery. Sleep mode keeps voltage live on components.
How do I clean a laptop screen without damaging it?
70% isopropyl on a microfibre cloth (apply to cloth, not screen), wipe in straight lines, light pressure. Avoid Windex, ammonia cleaners and paper towels.
Is compressed air safe for laptops?
Yes with technique. Keep the can upright (tilting releases liquid propellant), use short bursts, and hold fan blades stationary with a toothpick to prevent motor over-spin damage.
How do I clean dust out of the heatsink without taking the laptop apart?
Vacuum at the exhaust grille while puffing compressed air into the intake. Dust gets sucked out rather than pushed deeper. Blowing alone just relocates dust further inside.
What should I never use to clean a laptop?
Windex, paper towel, methylated spirits, soaking-wet cloths, acetone, multi-surface cleaners, bleach, tilted compressed air cans. All cause specific, predictable damage.
When should I repaste the CPU thermal paste on a laptop?
Every 3–4 years, or when temps climb 10°C+ above baseline, or after disassembly. Don't repaste new or under-warranty laptops — opening usually voids warranty and factory paste is fine.