I bought mine at Walmart. The one I had from Amazon I didn't like. The one I have now is good. Here’s a guideline: Oleophobic coating: Most better-quality protectors (including many DuraGlass ones) come with an oleophobic (oil-resistant) coating that helps reduce fingerprints and makes smudges easier to wipe off. This coating doesn’t make the glass completely fingerprint-proof — it just minimizes and makes cleaning easier.
One more thing. They do wear out. To test, clean protector with a microfiber cloth. Then off your fingertip drop a bead of water. If it beads the coating is still good. If it spreads out, the coating is worn.
