My xbox 360 game wont work and i tried evrything?

so i have my game its clean i did as much as i can do i used toothpaste i did the car polish windex to clean my disc but it still wont work then i thought it was the open tray error but when i did most of the solutions (the ones that didn't require me to open my xbox ) it still didn't work its not scratched what so ever but my xbox refuses to read it