Effective Ways to Clean Yellowing and Dirt from Plastic Window Sills

Sprinkle: Apply washing powder directly to stains.
Scrub: Use a damp sponge to work in the powder and rinse thoroughly with clean water.
Method 3: Window Cleaner
Spray: Use a glass cleaner on the stains.
Wipe: Let it sit for a few minutes, then wipe with a soft cloth and rinse.
Method 4: Vinegar
Dilute: Mix vinegar with water in a 1:1 ratio.
Soak: Apply to the stains and let sit for 10-15 minutes before rinsing.
Method 5: Melamine Sponge
Use: Simply dampen the melamine sponge and wipe over stains for quick removal.