Originally Posted by cranky old road

Tried drilling a hole in the end of one grip and then putting 100 psi through it with no movement. Then was able to get the grips to rotate after injecting first alcohol and then silicone spray under them using a very small screwdriver. Still couldn't pull them off until I put the air nozzle back on and blew the opposite grip across the garage. I used a washer to block the now open end of the bars and put the air nozzle in the washer's center. The second grip came off after repeated air and rotation by hand. Thanks for all of the suggestions. I had considered using heat prior to reading those suggestions, but didn't follow through: no hair dryer and concern that boiling water would ruin the foam.