One failure in 20+ years and you didn't blame it on your equipment or supplies? I applaud you! I used old Dektol once as a stop bath. Didn't watch my wash water temperature several times, too bad I wasn't trying to get reticulation. Tried to tone paper once for half an hour in just water (please don't ask how, it's painful).<g> And that's without even trying to remember incidents. I've been clean now for about 7 years, but that may simply mean I'm due.