Screwed up...And a warning:
The kill button was sticking occasionally so I thought, 'hey, I'll just spray a little electrical contact cleaner and lubricant into the switch and fix it'...WRONG!
The red plastic button that holds the contacts turned to goo. The contact cleaner I used said "safe for plastic" on the label. Guess they didn't test it on the plastic used in the Chinese kill switch. It reacted as if I'd used some strong solvent. Instead of lubricating, it dissolved the plastic button. Luckily I had a spare and just finished installing it. Bottom line: Be careful what you use to lube a sticky kill switch.
Before I put the new switch on I took it apart and lubricated it with a silicone grease...I know it's safe for plastic.
Tom