What camera and what kind of solvent? The eye piece
The solvent was denatured ethanol 90% that I got from a pharmacist friend of mine. The camera was an old Canon FTb. The lens didn't fall outside of the camera but into the pentaprism housing. Fortunately I was able to shake the camera with it pointed toward the sky and get the lens to fall back into it's correct position and glued it back in place. I suppose 70% isopropyl would be okay but I still wouldn't try it.

