Removing Mildew from Grout
Mold and mildew removal from grout can be accomplished. You need to remove mildew and soap film with a good scrub brush. Then remove the hard water deposits with white vinegar. Remove the embedded mold and mildew from the grout by soaking paper towel with bleach or oxygen bleach and placing them on the dirty grout. Use the oxygen bleach if you have a septic system.