That could do it. lol, make sure ur not giving them ANY nutes still. And about the heat, a heating pad should work, Or the hot humidifier, look in the grow faq and find what Humidity they should be at. and set the humidifier at that. I think around 50% is good? im not 2 sure, i dont have a humidifier myself. Do this and then make sure the temp stays in the 80's. And BTW check out my grow log, i jus got new pics of my baby's. The link is in my signature.