I' have used the AT-205 that Scotty Kilmer on Youtube recommended. It helps rehydrate the rubber. It definitely helps, but doesn't seem to last long. Would a silicone spray on the rubber parts work better?
Mostly in the rear. It's difficult to tell exactly what is squeaking. I just sprayed down all the rubber bushings and components I could see. Trailing arms, shocks, sway bar, etc. It quieted down nicely but it doesn't seem to last long. Maybe a few weeks. Then it starts back up again.Which parts are you talking about? If it's the front A-arms, then replacement is the only solution as the rubber has separated from the cans in the arms. Would be the same for the rear arms. If it's the stabilizer bar bushings, I'd just replace them and install them dry.
And don't listen to Kilmer too much. He's a quack, linda like Dr. Oz.