Carl, I know that- - - -but some of the young sprouts who hang out here have no idea why "sludge" gets formed. If us oldtimers keep repeating stale gossip, they'll never know any better! LOL!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!