I've not used one in a few weeks, but I still rock on my very first KPT3-mini, which is over 2-yrs old... and I was vaping on an Aerotank V2 (on a Cloupor mini) this afternoon while changing the clutch in my Probe
I don't mind vaping on my older gear, actually I prefer them, when I'm working in the grease and grime... if they get dirty I just soak them in soapy water and use the sonic cleaner to get in the crevices.... and if I break one... I don't feel too bad... although I've not broken one in a LONG time (knocks on wood)... even though I'm hard as hell on them when I'm working in the yard or garage!