Ya know, I’m starting to wonder if it’s my ultrasonic humidifier. That damn thing puts a hazy film over everything when in use during the winter. The ‘residue’ is easy to clean/wipe off, but am starting to think it could do either damage or at the very least can create problems with electronics.
I have a hard time believing if could actually find a way into used tube sockets, but am thinking it could indeed be an issue. And just removing and resetting the tubes took care of it.
Think I’ll get a non-ultrasonic unit for next winter.