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					Originally Posted by Mister Moo  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.
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 I have had a pipe crack from the "salt" method, and a friend had one crack after using unscented isopropyl.
Now, to be fair, it might have been the duration of the soak which caused the problem in both cases.  I got a phone call and the salt/alcohol sat for nearly 4 hours (instead of like 20 min.).  It dried the briar out immensely and I heard an audible pop when the bowl cracked.  I believe my buddy had the same problem, falling asleep after setting up his soak - coming back to it hours later.
You don't need Everclear.  In fact, I normally use a clear rum or vodka.  I used cotton balls instead of salt to fill my pipe.  And, I can let it sit overnight.  I am able to remove quite a bit of cake, and what is left is highly malleable.  It does need to dry a couple days.  But, it can be smoked with no ill effects.
If you can use isopropyl alcohol and pay attention to what you are doing, not getting distracted - I think you'll be OK.
I use the other method because sometimes "life happens" and if it does, I know everything will be cool whenever I get back to it.
Peace of the Lord be with you.