at first i thought it was the batterys cause when i came inside and changed them it worked fine , but as soon as it got cold i got nothing (kinda like dealing with my wife)... do these things need to be warm to work? if so thats going to suck bigtime for my green vortex contraption cause its fairly cold here around halloween...might need to rethink my design and add somekinda warmer....a small lamp perhaps..i dont know...