You wash the windows, you dust the sills, but there’s one place almost no one looks: the tracks at the bottom of the window. Dust, dead insects, pollen and grime build up there all year. More and more people now clean them with a sprinkle of baking soda. Here’s what it’s for, why cleaners recommend it and how to do it properly before winter.
Why window tracks get so dirty
Tracks are a trap. Every time you open a sliding window, wind, rain and dust settle in the channel. Moisture from condensation runs down the glass and turns the dust into a sticky grime. Over time, the window slides harder, the track smells musty and black spots can appear in the corners. Fall is the right moment to deal with it: once the heat is on, condensation will run down the glass and straight into a dirty track.
What baking soda does
Baking soda is a gentle abrasive: it lifts grime without scratching vinyl or aluminum. It also absorbs odors. Combined with a vinegar spray, it fizzes and loosens what’s stuck in the corners, the hardest part to reach.
How to do it
The method recommended by Glass Doctor, a U.S. glass repair company:
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- Open the window fully and remove the screen if you can.
- Vacuum loose dirt with a narrow hose attachment.
- Loosen the rest with an old toothbrush.
- Sprinkle baking soda on the dirtiest areas.
- Spray a mix of white vinegar and water until the baking soda is damp, and let it fizz for about five minutes.
- Scrub from top to bottom, focusing on the corners, wearing gloves.
- Soak up the residue with rags or paper towels, then wipe with warm, soapy water if needed.
- Let everything dry completely before closing the window.
Glass Doctor recommends doing it at least once or twice a year, ideally in spring and fall.
Don’t forget the weep holes
Many windows have small drainage openings at the bottom of the frame, called weep holes. They let water that gets into the track drain outside. According to the Building America Solution Center, a Department of Energy resource, clogged weep holes can let water pool inside the frame and damage the wall around it. While you’re cleaning, pour a little water into the track: if it doesn’t drain, gently clear the holes with a pipe cleaner or a small brush.
The limit
Baking soda cleans and deodorizes, but it doesn’t disinfect, and it won’t fix a window that sticks because of a damaged roller or a warped frame. Use only a little liquid: flooding a track with clogged weep holes can send water where it shouldn’t go.
There’s another trick for tracks, as we explained with the toilet paper some people lay along them. Windows have other uses too, like the spoon some people place on the window. And baking soda has a stronger cousin for tough grime: the baking soda and hydrogen peroxide mix.
A sprinkle of baking soda, a spray of vinegar and an old toothbrush. That’s the trick.
