OK, now that you have turned it on really tight because you forgot that it has left handed threads, all is not lost. Do the old freeze/heat trick. Lots of people have been down this road so you are not alone. Put the slide in the freezer for a few hours then take it out and hold the TP over a candle for just a few seconds to heat up the TP but not the barrel. With a cloth to give you some grip it should turn off, but turn it the correct way this time, Lefty tighty, righty loosy.