Good pics, as always, Art. Makes you realize that trying to squirt contact cleaner or WD40 into edges and small external openings of the switch body may not make a huge difference in being able to dislodge offending grunge. Open switch surgery for a proper cleaning and inspection is often warranted if you're trying to resurrect a problematic switch hoping it will last.

I often encounter that thick brown factory grease in our switches. Considering the age of our vehicles, that stuff lasts a long time. After cleaning, I usually replace it with the silicone dielectric grease I always have on hand. It's a considerably thinner consistency so likely doesn't last near as long. Do you use anything in particular or even just bearing grease?

It's not always easy to open a switch body (or relay) without damaging it or being unable to reassemble it. It simply takes practice and learning not to go too far. People have to be prepared to occasionally cause fatal damage. You always do such a tidy job, Art, hardly even noticeable to the casual observer you were in there, sign of a true perfectionist. When you've been around so many bricks for so many years I find it's hard to remember which things I've tried to resurrect before. I've taken to writing or scratching an R with the date on it to remind me. It gives me an idea of how long my fix lasted and whether it was worth all the effort. Some days I'm really impressed, like getting over 10 years out of an FP relay. Some days not so much, like the last auto trans PNP safety switch I did where I only got an extra year or so. I tried a little harder this time to make sure the contact had a bit more tension.

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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now