Possible mold issue

First, a change of smell alone may not be mold, but you'll want to look them over for symptoms... check out google images for some examples and go to work. you've probably smelled a moldy room before... if it has hints of that, it's not a great sign but i'd still observe for 100% verfication before doing anything crazy.. Those aren't dangerous levels for microbial growth. The night time humidity is a bit inviting but borderline. You may be colonized and need a deep clean of the area and the room, especially if you have a recorring problem. If you do find some rot, definitely decontaminate the area thoroughly before next grow. Try cutting out any rot and carefully removing, like you would with a pollen sac -- with concern about spread.