Dentists are issuing a warning about using a Mr. Clean Magic Eraser to clean teeth after the trend has gone viral on TikTok.

The original video received more than 255,000 likes since it was posted in June.

An orthodontist said a Magic Eraser is basically foam that's hard as glass and acts as a really abrasive sandpaper, and it's making your teeth white because the product is scrubbing off the enamel, the hard, protective outer shell of the teeth.

The company’s packaging warns users to “not use on skin or other parts of the body.”