1) is there a "correct" method to slipping them on? I've used hot water before, and it makes it easier compared to what feels like putting the frame at risk, but does that risk them getting loose/stretched more easily? 2) on that note, once they stretch, there's no going back - or is there? The ones on my Radarlock started stretching and back end was creeping to the end of the stems; but they seem perfect otherwise. I'm not sure if it was from general use (cycling) or repeated cleaning over time. I guess I can use them as pen grips if there's no saving them.