Ignition switch cleaning method

[Big T]

I've been having resistance in the ignition switch for a while, and I've taken it apart and cleaned it with ultra fine sandpaper and contact cleaner.

I just had another main fuse pop, so I got out the voltmeter and started checking resistance in the circuits.

Got to the switch 16-34 ohm!

Took it apart, it's a bit discolored and some arcing occurring.
I put both contact parts into a vinegar bath

Any other suggestions on getting the parts clean ?
And, how to keep them that way?

 

[Nessism]

Acid may need to be neutralized. During assembly, dielectric grease helps

 

[Rich82GS750TZ]

Had mine apart a few years ago after having to fiddle with the key. A process I've developed for cleaning all electrical connections on the bike.
1) Slather any terminals or electronic connector parts with Naval Jelly. Let sit for 10-15 minutes.
2) Use water pic to blast off the naval jelly (into a rag on my hand - Old clothes and eye-pro highly recommended.)
3) If any verdigris remains, repeat step 1 & 2 till all connectors are spic-n-span
4) Blast w/ compressed air.
5) Blast w/ Electronic Cleaner Spray to clean up any remaining water.
6) Just a spritz of Deoxit to coat the parts.

The hard part about the switch guts as I recall is a the ball bearing(s) don’t remember if 1 or 2. And it is possible to reassemble everything exactly 180 degrees wrong. Ask me how I know. There’s a cross shape you have to match up that confused me.

I won't get into Dielectric grease. That seems to be a triggering topic. And Todd, you know more than me about this stuff and have no-doubt formed your own opinion on its uses.

 

[Big T]

Yeah, I've used DeOxit as a final rinse.
Still having the issue
Here's the bottom plate

 

[Big T]

And here's the top
The difference in color tones is due to reflection

 

[salty_monk]

I gave up and put a relay in place so basically all the switch does is trigger the new ignition relay…..

that’s pretty much a simple version of what most modern bikes do now.