Your environment might be dustyHow about adding a screen protector?
Well, I do live in AZ, so it does get a bit dusty but my 925 didn't have the issue.
As for a screen protector, I haven't used one in years. Phones have gone in and out of my pocket all day long for years and I only had one small scratch on my original Motorola Droid that wasn't noticeable in 98% of all situations, so I concluded it was money I didn't need to spend.
