My Canon Xi120 is a job site tool that rides in a leather BAR Magazine case on my hip and after replacing the previous Xi110 model due to screen glazing and scratches, I put a plastic skin on the new cameras screen and after 1 year I swapped the skin and the screen underneath was pristine.

Did the same for my Barakberry as the MF'er is indestructable with the Chinese made thick rubber condom cover I got from a street vendor for $5. The surface has a series of slanting grooves that give it a grippy feel so it does not want to eject from your hand.

On my Netbook I don't bother but I do use a screen friendly spray cleaner once a week.