I exchanged my old 3GS for a new one about a week ago due to some software issues, and I have noticed that this new replacement (brand new, not a refurb) attracts fingerprints/smudges really easily, and does NOT wipe off easily. With my old 3GS, one quick swipe on my jeans would remove ANY smudges. With my new replacement, it takes 15-30 seconds or so of rubbing to get rid of about 90% of smudges. Is my screen defective?