Answer by
Mj23 (65)
Probably hard water stains. Try the mixing 1/2 cup of baking soda,1/3 cup of ammonia,1/4 cup of white vinegar, and 7 cups of water together. Spray or wipe it on and see if this removes it. As always spot check in a non-conspicuous place first. DO NOT get desperate and start scrubbing with anything really abrasive. Good luck!