How often should you clean your window tracks?
Grumpty's answer
Every 6 months
Why bother
Grit clogs the weep holes and rot follows the water. A thorough-tier job. Skippable when life's busy, worth it when it isn't.
Why it's a range
Dusty, humid, or pollen-heavy spots want it quarterly.
What the job involves
- Open the sash all the way and vacuum out the loose dirt, dead bugs and grit with the crevice attachment. Get the worst of it gone before anything wet goes near it.
- Dust a little baking soda along the track, then spray or pour white vinegar over it. Leave it to fizz and loosen the muck for five to ten minutes while you find something else to grumble about.
- Scrub the corners and channels with an old toothbrush or a small stiff brush, wipe out with a damp cloth, and run the vacuum over it one last time.
- Clear the weep holes, the little slots at the bottom of the outside track, with a toothpick or pipe cleaner so rainwater can drain. Finish with a dry silicone or PTFE lubricant on the track. Never oil; oil just collects dirt and you are back where you started.
Do it yourself, or pay someone?
Yourself. It's a toothbrush, a vacuum, vinegar and baking soda, costs next to nothing and runs a few minutes per window. Nobody comes out for just this; it gets folded into a full window cleaning, roughly $150 to $300 for a typical house. Pay a pro only once a sill has rotted, which is a window-repair job at $150 to $700 a sill.
What skipping it costs
$150 to $700 is what a window specialist charges to replace a rotted sill, averaging around $400, and that's the contained outcome. When the track's weep holes clog, rainwater has nowhere to go, so it pools and sits against the wooden sill and frame until the wood goes soft. Caught at the sill, it's that sill-replacement job. Let it reach the wall and it climbs fast: dry-rot repair averages around $1,400, water-damage restoration runs roughly $3 to $7.50 a square foot, and mold remediation averages around $2,400. A toothbrush and a toothpick is the cheap end of all that.
Signs it's overdue
- Water pools in the track or creeps over the sill during rain instead of draining away. That's the weep holes clogged, and it's the warning that matters most.
- The window grinds, sticks, or won't slide open the way it should, because grit has packed itself into the track.
- Dark gunk, mildew or mold sitting in the track, or wood on the sill or frame that's gone soft, discolored and spongy.
When to start thinking about it
A few days' warning does it. Grumpty grumbles 4 days out, then leaves you alone. Mark it done and Grumpty sets the next one, every 6 months, so you can go back to forgetting it exists.
Questions people ask
How often should I clean my window tracks?
Twice a year is the usual baseline. Bump it to every three to six months if you're somewhere dusty, humid, or heavy on pollen, since all of that packs the tracks faster than they'll drain.
What are the weep holes and why do they matter?
They're the small drainage slots on the bottom of the outside track that let rainwater escape. Block them with dirt, caulk or paint and the water backs up in the track, soaks into the sill wood and rots it, and given long enough it reaches the wall and brings mold and water damage with it. The whole point of the clean is keeping them clear.
Should I lubricate the tracks after cleaning?
Yes, with a dry silicone or PTFE spray, not oil. Oil-based lubricants attract dust and grit and make the sticking worse over time, which is the opposite of the job.
Related jobs
Stop keeping this one in your head
This is one job. Your home has dozens more, each on its own clock. Grumpty is a free home-maintenance app: add a job once, it tracks the date, grumbles when it's due, and rolls it forward the moment you mark it done.
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