Window tracks are the most neglected surface in most homes. Dust, dead insects, mould spores, and oxidised aluminium compound into a grey-black grime that is genuinely difficult to clean once established. The good news: the right sequence — dry, foam, scrub, dry — removes even years of build-up in about 15 minutes per window.
What changed in 2026
- Cordless handheld vacuums with crevice attachments are now in most households, making the critical first dry step far faster than using a brush alone.
- Microfibre cotton-swab alternatives (reusable silicone cleaning sticks) have largely replaced disposable cotton swabs for this type of cleaning.
- Mould-specific sprays with tea-tree oil are now widely available and effective on the black mould that commonly colonises window track seals.
What you need
- Vacuum with crevice attachment (or a dry paintbrush)
- Baking soda
- White vinegar in a spray bottle
- Old toothbrush or small stiff brush
- Cotton swabs or silicone cleaning sticks
- Microfibre cloths
- Dry paper towels
Step-by-step
Dry vacuum the track. Use a crevice attachment to suck out loose debris, dead insects, and dust. If you do not have a vacuum, sweep with a dry paintbrush into a folded piece of tape or kitchen roll.
Sprinkle baking soda. Spread a thin layer of baking soda along the entire length of both tracks.
Spray with white vinegar. The foam reaction lifts compacted grime off the metal. Let it fizz for 5 minutes — do not rush this step.
Scrub with a toothbrush. Work along the track in short strokes, getting into all corners. The bristles break up grime that the foam has loosened.
Tackle corners with cotton swabs. The 90-degree corners at each end are where mould concentrates. Swab firmly — you may need 3–4 swabs per corner.
Wipe out with a damp cloth. Fold a microfibre cloth to fit the track channel and run it along the length to pick up the loosened grime.
Dry immediately. Use dry paper towels or a clean cloth. For aluminium tracks, a hair dryer on low heat speeds this up and prevents oxidation.
How to handle mould
If you see black spots (mould rather than dirt):
- Apply a tea-tree-oil spray or a 10% bleach solution to the affected area.
- Let sit 10 minutes before proceeding with the baking soda step.
- Wear gloves and ensure ventilation.
How to pick
- Lightly dusty tracks? Vacuum and a damp wipe is sufficient — skip baking soda.
- Compacted grey-black grime? Full baking soda and vinegar foam method.
- Visible black mould spots? Pre-treat with mould spray before the main clean.
- Wooden window frames? Reduce the water used — dampen cloths rather than spraying, and dry very thoroughly.
Comparison: methods at a glance
| Method |
Time |
Effort |
Best for |
| Vacuum + damp wipe |
5 min |
Low |
Light dust |
| Baking soda + vinegar |
15 min |
Medium |
Built-up grime |
| Mould spray + scrub |
20 min |
Medium |
Black mould |
| Steam cleaner attachment |
10 min |
Low |
Heavy grease or mould |
Common mistakes
Adding liquid without removing dry debris first. The dust mixes into a paste that smears instead of lifting. Always dry-clean first.
Scrubbing too hard on aluminium. Scratches the surface and removes the protective anodised layer, making future grime adhere more easily.
Not drying wooden frames. Moisture in wood tracks causes swelling that jams the window and encourages mould regrowth.
Cleaning the track but not the rubber seals. Mould on the seal will re-colonise the track. Clean both in the same session.
What to skip
- Steam cleaners on wooden frames — too much moisture, causes warping.
- Wire brushes on aluminium tracks — they leave metal filings and scratch the surface.
- Pouring water directly into the track — even small amounts seep under the sill. Damp cloth only.
FAQ
How often should I clean window tracks?
A quick vacuum every 2–3 months and a full clean twice a year (before summer and before winter) is sufficient for most homes.
How do I prevent mould in window tracks?
Reduce condensation by improving ventilation and keeping indoor humidity below 60%. Wipe moisture from tracks after foggy or rainy periods.
Can I clean tracks without removing the window?
Yes — this entire method works with the window in place. Slide the window to one end to access the exposed track, clean it, then slide the other way.
My tracks are heavily oxidised aluminium — what helps?
A dedicated aluminium cleaner (available at hardware stores) followed by a thin wipe of mineral oil restores the surface and slows re-oxidation.
Where to go next