<b>Replace the eraser</b></br> </br> 1.After the rubber is used up, pull out the rubber clamp. </br> 2.Then pull out the eraser about 3mm. </br> 3.Back to the original, you can re-use. </br> </br> <b>Warning</b></br> </br> 1. Avoid placing any parts in your mouth. </br> 2. For long term use, please remove the battery when it is not in use. </br> </br> <br><b> Quality Guarantee: <b> If you have any dissatisfaction with our ladies pullover please connect us freely, </b></br> <b> we will try our best to solve the product for you. You also can require a refund or replacement for any dissatisfaction product. </b></br> </br> <b><b>Dear customer, Welcome to OAKBaby, we will check your order and package carefully before shipping.<b/><br/> <b><b>Please contact us once you have any question, we'll reply back as soon as we can.<b/><br/>