Q: Could I clean up some smudges on the surface of my EPSON Perfection 3490 Photo Scanner using windex or something? Can this damage it?
A: The inside should be clean considering that nothing ever touches it. Yes you can use Windex, but don't spray it directly on the glass or it could seep inside and cause problems. Instead, spray the glass cleaner on a soft cloth or paper towel and then clean the glass surface.