The biggest bitch with heat is when you attach the system. Sometimes I have trouble in the summer, even with the blue lace tape. If your scalp has any sweat on it, the tapes simply will not stick. it is very important to have a dry scalp when you attach, and then after about 20 mins or so you can sweat all you want with the blue tape. But it needs to be attached good the first time and have a little time for the adhesives to dry. This can be tricky if your in a place where you cannot stop sweating, Then u get nervous because ur tapes arent working that makes u sweat more, and its a very shitty and frustrating cycle. I say this because i had to attach once in a place with no air conditioning, and it was like mission impossible lol Couldnt stop sweating.