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					Originally Posted by RevSmoke  ...That stuff does nasty things to briar, so the next time you smoke it, you can crack your pipe.  Doesn't happen all the time, but... | 
	
 Is this amply demonstrated or is this hearsay?  I ask because I have used unscented isopropyl 91% for sterilizing and destinking bowls/stem interchageably with Everclear 190-proof and never had problem 1.  Only problem I ever heard of (for sure) with iso was from folks who fouled pipes with alcohol that had scent- or bittering agents.
I think a clear, definitive evalution of iso is important as many among us are unable or unwilling to purchase grain alcohol.  I'm not sure I know about one.