hey there sndwich, it's possible that the tent has been contaminated, the best you can do now to clean the tent is use a bit of dishsoap as cleaner. Most other cleaner will actually damage the reflective part of the tent, so just make sure it's safe before you clean the mylar. the truth is though, it's never going to be 100%, so make sure you fight bad mold with good / beneficial bacteria, that's still the best defense we have. hope this helps ! 🚀