There are a variety of products specially for mould removal. Typically bleach and chlorine are used. You will need to spray and leave any product directly on the mould (but taking care of not letting the spores fly up) and leave for the recommended time on the bottle.
For a non toxic option, vinegar kills mould spores and can clean away mould, make sure you leave it for 15 minute blocks, wipe, wash and repeat twice.