Quote Originally Posted by DBP
Has anyone tried "Goo-gone"? I know if will remove the foam residue, but is it safe for the focus screen?
Many screens are not simply ground glass. Some are laser etched, others have molded plastic surfaces. Applying pressure can deform the "ridges" that make up the surface of the screen. This will result in dark areas on the screen that can not be cleaned. If I were going to use a solvent product to clean a plastic screen I would remove it from the camera and try a tiny bit on an out of the way spot first to determine compatibility.