Well I can add another method that doesn't work for restoring a poorly performing atomizer. I am a Ham Radio Operator and I was sure that the high performance contact cleaner "Deoxit" would work. But, I was wrong. I tried to soak 3 atomizers in the solution, one was left overnight in the solution. I revived only one, it was the youngest of the 3 and might have responded to other methods as well.
I will try the Hydrogen Peroxide on the 2 that didn't respond to the deoxit. These poor atomizers still have good electrical resistance. I'll be watching for good news from other's attempts.
Kevin