iCanBreathe

Anyone know this?? i tried the PTB mod, but all the videos were doing it on the 510... well, to my surprise, ONE ptb fell out of my 801. So, i tried TWO. I think it was too much.. NOt sure. then, I cut the end towards the bridge in the atty and i kept getting a burnt taste no matter what i tried. So, does any one know a way of using the PTB mod WITHOUT the burnt taste, and with out the PTB falling out?? any suggestions are appreciated. I think when i cut the end, it somehow burned to the atty, hence the burnt taste. What to do now??? thanks