I think on the lavendar & menthol baths, the packaging warns about using it on children with asthma. We used the J&J menthol baths when DS was stuffed up. With the wipe warmer, I'd assume things could probably get warm and grow in there. I saw the wipe warmers in the store, but was mean mom and just used ice cold wipes <img src="i/expressions/devil.gif" border="0">