In this thread someone mentioned that you should give them some water in a small dish with some pebbles. So it might be that they need water to survive, and maybe even moreso if it's pretty hot there like you're saying.

I'd wait for an opinion from one of the experienced growers though, I'm just learning. Anyways, good luck on it. Hope you can keep those mites out.
AR15 Reviewed by AR15 on . Purps Five weeks into 12.12 Here are a few pictures of my Purps plants five weeks into flowering. I am having a bit of confusiong as to weather the burning on several of them is from heat stress or nutrient burn. My temperatures are 76 degrees lights off, and sometimes as high as 87 lights on (87 is the temp around the floor where the lights are on, which leads me to believe my canopy could have been over 90 pretty easily. I had some problems with ventilation but got it worked out, and hope to see lower temps Rating: 5