I've removed and replaced grips 100's of times on motorcycles and bicycles for over 40 years using a chop stick (Wood or plastic) and Coleman fuel (A few drops). Takes but a few seconds and the grips stay put - and, yeah, yeah, I don't want to hear it...*

However, since their introdution I've switched to clamp-on grips, which is the best solution.

*I don't subscribe to threads, so I won't read it anyway.