Touch ID Boost, NEWBEE Touch ID Recognition Boost Sticker for iPhone & iPad Helps improve the recognition success rate of Touch ID It reduces the interference of sweat, dust on your finger, which makes the fingerprint clearer Not lifetime solution, will be less effective during time. Thus we put a dozen pieces in this set The effect time changes due to various circumstances. More sweat, stains or water will make it shorter Static attach, no glue remains