Minolta XG-1 screen
I was recently handed an old Minolta XG-1 SLR camera by my mother. The batteries are dead and there's no film in it. It comes with decent lenses but when looking through the viewfinder I can see marks. I managed to clean some off but there are still some marks at the bottom, and a few in the center. I took a picture with my iPhone through the viewfinder so that I could post it here - any thoughts on how I can clean/get rid of it?