I've found an even more interesting solution, didn't know about the hairspray thing. I was installing some longer grips on my MTB after removing the grip shifters, and I was having trouble squeezing the new ones on. Tried greasing both the grips and the bar up with 3-in-1 oil, but no progress. After thinking about it a minute to try and come up with an alternate solution, it occurred to me that there was some, ahem, "personal lubricant" around...
... those *******s slid right on.