Well 'sjbiat', seeing as how your avatar photo shows you fording some river, I'm gonna guess you might also just have some crusty and complaining shock bushings. From the automotive world there's a wonder goop called "AT-205 Re-Seal" made by ATP. It's normally used as a seal rejuvenator to button down automatic transmission or power steering leaks, but some folks have used it to cure squeaky suspensions by just generously spraying or dripping it onto the bushings and letting them marinate a bit. It's a little pricey at about $20, but less than a fresh pair of shocks. Thing is, unlike WD-40 or other lubes, it's a polymer liquid that contains no petroleum distillates, which might possibly do your rubbery bushings no favors in the long run. Here's an Amazon link if you want to check it out:
https://www.amazon.com/ATP-AT-205-Re-Seal-Stops-Bottle/dp/B000NVW1LMYou might also do well to make sure that all that squeaky moaning, which I might otherwise personally find highly gratifying in other aspects of life, isn't being emitted from the often-neglected swing arm bushings.
Or, you could just throw caution to the wind, slop those shock bushings with whatever lube is handy, and as they often advised in the
Haynes Book of Lies of yore, "observe effect on performance."