Bleach does not remove Mould
When it comes to mould, bleach is a bad idea. Bleach does not remove mould but instead makes it invisible. Bleach also feeds mould and can actually cause more harm than good.
Bleach does not destroy mould, so the problem will only grow larger. Mold is very persistent and difficult to remove, so if you want to get rid of it you need to physically remove it..