No two teeth are alike… and no two users are alike either. How long SimplyFloss will last will depend on how often it's used and how tightly your teeth are packed. Due to the stretchiness of the silicone, SimplyFloss can be a bit of a learning curve. If you pull it too tight or overstretch it… or maybe if you’re a super enthusiastic and vigorous flosser ;-) SimplyFloss can break sooner than it should. Once you get the hang of it, you can expect SimplyFloss to last anywhere from 10-20 uses.