I lost 5 atty's in one day, I never found out why, but it did lead me to buying a multimeter and I did some tests on new and dead atty's
Here's what I found
Put the multi-meter on to the lowest setting of oHms (thats the upside down horseshoe symbol) mine has a 200 setting
My Good and new atty's would read
901's= 3.5-3.6
801's= 3.2
510's= 3.0
All of the ones I killed read 0.2, but did pass a continuity test
Not much help, but a little further info
Sure hope ylu find and answer as I never did, (but I dont clean them with water now)
Also my pass
through doesnt make a connection so I too have had to put a tiny piece of curled wire between the PT and atty
Glenn