Spray some PB blaster( perferably) , or if you must - wd40 ( junk in my opinion) on the rubber bushings. LET IT SOAK IN. The " miracle" won't happen in just 2 minutes.
Ruglide ( tire mounting solution from NAPA works well also). You just may not have to buy a whole gallon for your application.
Bottom line..... The rubber bushings are DRY.
Been doing this since the Earl 70's when l worked in a 2 stall SERVICE Station.
Where we actually SERVICED customers cars instead of trying to rip them off.
(As in today's "Corporate" world)
