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Can you throw some sort of lubricant on old cams that have require a lot of force to engage? I haven’t done any reading on the manufacturing site
Yeah. Metolius sells rebadged bicycle chain lube for that purpose. It's worthwhile to boil them, then clean them with toothpicks and q-tips first, just to get them into a shape where lube might help.
Yup, use a teflon based dry bike chain lubricant. I have numerous 15+ year old cams (trango and metolius) that still work great, although they aren't machined nearly as tight as current cams so they are less prone to gunking up.
To help clean the gunk out and get things moving again you can use WD40. Once happy with movement wash it off with dish soap, dry, and apply the more expensive lubes others have pointed out.
You can even boil water and wash the old grease out with dish soap. The hot water really gets the job done, but it can be cooler as well.