First remove any large particles with a soft bristle brush.
How to clean sliding door weep holes.
Never use abrasive or acidic cleaners they might cause permanent damage to the frame finish.
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How to clean sliding door or window tracks duration.
Windows and patio doors are designed with a weep drainage system on the exterior bottom of the frames to help protect the inside of your home.
Ceramic cooktop cleaner to a soft clean lint free microfiber cloth or paper towel.
Do you have water leaking in through your pvc door.
Then wash the surface using warm water a mild detergent and a soft absorbent cloth.
Once clean you should be able to pour a small pitcher of water into the track and watch it migrate to the weep holes and trickle outside.
Get a pipe cleaner coat hanger popsicle stick or just about anything else that will fit through the weep holes and clean them out.
Older tracks without weep holes may need to have some drilled.
If the mark still remains on the room facing low e glass surface apply a small amount of bar keepers friend or cerama bryte.
Rub the marked area from several different directions.
Never use a dry cloth as hard particles can abrade the finish.