compressed air....
Have always heard hair spray was good for locking them on when installing, never heard of it being used for removing.Hairspray (Clairol, etc) is even better than WD.
+1 by all meanscompressed air....
wd40 and other spray lubricants with nozzle extender to get under the grip will loosen any previous grip glue.. yes, wipe any excess lubricant from bar b4 applying new grip.If WD is used, you have to really get it all off the bar or the things won't stick well.