This is information I found on google, I'm going to do this since I noticed yesterday mine is starting to smell moldy.. I clean a lot with vinegar, after it dries on surfaces there is no odor of the vinegar !!

Vinegar is a mild acid which can kill 82% of mold species. (Baking soda is often used along with vinegar for killing different species of mold). To kill mold: Use white distilled vinegar and pour it into a spray bottle without watering it down. Spray the vinegar onto the moldy surface and leave it to sit for an hour