SnellExperts, if you have the name of the stuff you use to kill the mold, please feel free to share. I'd like to treat the entire space with with something guaranteed to kill the mold. Tried the borate solution mix, but my sprayer kept clogging up, so willing to pay a little more for a premixed solution. I like the venting option for Spring. For winter, concerned encouraging air flow will freeze pipes and have a negative effect on the plumbing.