C.D.
There are many products you could use but all are just masking the problem.My husband does drywall for a living and once mold gets in the sheet roc you have to tear it out and replace it as it will not go away but it is likly to spread and get into the incolation as well. Mold is very bad for your health and needs to be taken care of. Running the fan or opening a window helps keep the mold from growing. Your hubby not wanting to make noise is understandable but when you weigh the cost the noise is worth it in the long run. I hope this helps. I don't mean to be rude or mean by this comment. Just want you to know the truth. We had this same problem and it didnt go away till we replace the sheet roc and after my family stoped being sick so much.
C.