Drip marks on your bathroom walls can occur for many reasons, even from something as simple as the water splashing on the wall when you are washing your hands. Removing water drips from the walls in your bathroom is easy. Use a glass cleaner on the surface, then take a textured sponge and lightly scrub the area. Next rinse off the sponge and wipe remaining cleaner off the surface. For marks that are more stubborn, use a more aggressive cleaner like soft scrub. Make sure you wipe the area daily to keep the buildup of soap scum down and your bathroom walls bright.
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Video: How to Remove Drip Marks on the Bathroom Walls | eHow.com