Precautions:
1. The shower mat can only be attached to smooth and clean surfaces, not to textured, tiled or non-smooth surfaces. Make sure the bathtub is clean.
2. Wet the bathtub with a little water, then press the bath tub mat non slip to fix the suction cup tightly on the smooth bathtub.
3. After repeating the above action, or if the shower mat still moves, please press each suction cup one by one.