First let me say I love Winchester Power Blast. Works great but I found out one drawback the hard way. I was out plinking with an old H&R 32SW long today. Had'nt picked it up in a long time. Well long story short I got done & started cleaning it. Guess I was just being lazy but I didn't remove the grips to clean it (which I usually do). Well I started spraying the power blast on & the plastic grips started litterally melting in my hands. I was told that it's ok to use on polymer guns but now I'm skeptical. Anyone else had this happen?