"He who marches out of step hears another drum." ~ Ken Kesey
CCI GR-70 it will clean your screens so they look new. Just pray on move it around with a scrub brush to get it everywhere and then let sit for a min or two. Then pressure wash off. Its not a degreaser but it cleans everything out. I have used CCI Liquid Renu-it and it just does nothing. Do you guys soak it in it or something. I have some here and it will sit until I toss it.