ok working with my 04 400ex. i rolled it a few weeks ago and it was in water/sand. well i bent the bars in doing so and i finally swapped them out. i didnt have any grip glue but thats what i had on them the first time when the left grip came loose. my buddy’s left grip is loose, and so is another. seems like its always this side.

when i put the grips on my new bars i cleaned them out good and i used hair spray like i used to on my bmx bicycles. but they had smooth bars on both sides. and these ones have a knurled left side to the bar. well this was on tuesday. went riding today and the right grip is on there solid, doesnt even try to budge. the left grip may as well have freaking grease inside of it……………..

how can i fix this? its both annoying and unsafe as all get out!