Wanted to fly today, clear skies and 20deg F. Decided to try a little spritz of remington gun dry lube. It worked fine.
Thought about using some silicone spray, research said, "not good for electrical contacts or plastic/foam rubber".
Made sure to spray the dry lube at a 90 deg side angle and not force any into the switch. Was able to fly without the PTT sticking.
Now planning to buy a complete new switch and replace, for now the temp fix is working.
Best regards,
Mike Bauer