What is the best stuff to remove black mould on and around Barth sealant, I am in the process of removing the old sealant but there is still a small amount left, I have tried stuff from homebase but doesn't seem to be much good, what about bleach ?? , also I have a small patch in the corner of my lounge, hidden behind a speaker, obviously I was stopping ventilation and have moved it, what is the best stuff to remove and prevent it reoccurring, thanks
