It’s back to school and this awesome trick will help her keep her earring on in a pinch, if she loses an earring back. Here’s a great lost earring back fix! Take the eraser from a pencil and used it to make a temporary backing. Stick the earring post through the eraser to make a hole, and swap out the eraser for a regular back upon arriving home after school. Who knew pencil erasers could come in handy for more than just math?!