I've got mould/green stuff growing on the white sealant which provides a seal between the edge of the bath and the tiles. I've tried using the standard bathroom cleaner and leaving it to soak in, but it doesn't work. Will I have to remove the sealant and re-seal it?
I have found if the surfaces can handle it. Almost all bathroom tiles can. You can use straight chlorine bleach in a sprayer with caution. (bleach can be very harsh read labeling on bottle) and spray on the mold or mildew. Let this set for about two or three minutes and then thoroughly rinse. If it is indeed mold it should kill it and loosen it so regular cleaning methods should remove it. (Scotch bright, or green back of kitchen sponges work well but make sure it doesn't damage you finish).