So I have been having recurring mold issues even though I wash every 1-2 days and make sure everything is completely dry afer washing. I can't figure out what the deal is. Every time i think I've rid them of the mold, it reappears a few weeks later. I saw on the thirsties website that grape seed fruit extract will kill mold and mold spores. So my question is can I just add that, or something else that kills mold, to every wash just to keep the mold away? Is there any reason I would not want to do this?