There's an oleophobic coating that is supposed to reduce fingerprints and smudging (specifically the oils from your finger). A few days sounds early, but that will wear off eventually anyway and I've never found it particularly effective even when new. At some point I just forget about it and start using windex every few days (works great on my iPads and iPhone 4S). After you clean it with something like windex or soap and water, it will feel a little catchy for a short time as you have removed all the oils that help your fingers glide.