Thanks Joe, but that's not the amount one would put to revitalize dry switch track/s in a pinch
i.e. that 'drop' is way too much and will cause issues.
One pass with a moist cotton bud, and a second pass with a dry bud dabbed on to pick up any excess and mop up any surrounding areas and gaps is the way to do it. Good luck with the
'before and after' arcing biz from track to track then
After the kero odour disappears, you're good to go, and it won't attract any more dust than exotic grease or the mud products that petrify over time.
One last time...if you had a badly performing meter with dry switch contacts,
with NO OTHER ALTERNATIVE but saliva, water or WD40 to apply lightly and carefully on to the metal contacts,
and needed the meter functioning ASAP, what would you do?
Well, I've applied it SPARINGLY many times and have not seen any plastics degrade nor CB or switch tracks lose their 'adhesive-ness' or peel off like sunburn on any boards.
The stuff comes off with IPA or non-residue switch cleaner anyway, so no drama.
Millions would agree with me, millions won't,
and the rest may be doing it WRONG,
or have the correct lubricant available so they don't have to go there.
Guys, OP asked if WD40 would be ok, I assumed that's all he had on hand and needed the meter working asap,
so I honestly commented YES you can
I didn't say to spray the stuff on like Deoxit, Servisol, Glen20, and take his chances
Please Consider