Can not kill this part of the mold which is why removing mold on drywall with doesn’t work. It is like trying to kill an apple tree by picking its fruit off. In fact, mold is often resistant to and the added moisture from a solution can actually feed the mold..Mold on Drywall If you find mold growing on unpainted drywall in your home you will have to remove the drywall and replace it. Unfortunately there is no way to completely remove mold from unpainted drywall since it is a porous material. How to Remove Moldy Drywall Use a utility knife to cut out any section of drywall with mold on it..Use of to clean mold on drywall is not recommended. While may kill most of the mold on drywall, the small amounts left would regrow if the moisture source has not been identified and corrected. Furthermore even the dead mold is still a health hazard. At one house there was visible mold on drywall..Eliminate black mold health risks by learning how to remove black mold with help from HGTV.com..