My cousin once missed a job interview call because his phone was so full that the dialer app kept crashing, he had like 4000 photos of his cat on there. He ended up deleting everything in a panic and the guy called back an hour later, got the job somehow. Storage wars are real, my friend.

Dunking shutters in an ultrasonic is a time saver, and a lot of shops have been doing it for years without issues. The real problem is usually the wrong cleaning solution or leaving them in way too long, not the ultrasonic itself. Blaming the machine sounds like an easy excuse when the setting or the fluid choice was the actual issue.

Big deal, one guy guessed right years before it was obvious to everyone.