1 Prepare for safe work
Ventilate the room, put on gloves, and test the cleaner on a hidden area first. Protect children, pets, textiles, and sensitive surfaces.
⚠ Warning: Never mix bleach with vinegar, acids, ammonia, or other cleaners. The mixture can release toxic gases.
2 Determine the condition and cause
Open the window and inspect the entire seal for dust, paint, cracks, flattened zones, and detachment from the groove.
3 Perform the key check
Wash with lukewarm water and mild detergent, clean the corners with a soft brush, and dry completely without solvents.
4 Do the repair or maintenance
Apply a very thin layer of the product allowed by the window manufacturer. Replace a torn or permanently hardened seal with an appropriate profile.
? Tip: Photograph the initial state and change only one thing at a time. This makes it easier to determine what really solved the problem.
5 Test the result
Remove product residue according to the label, dry the surface, and inspect the result in daylight. If the problem returns quickly, find the source of moisture, dirt, or malfunction.