The most important thing to know is that the majority of bath mats only work on smooth surface tubs. If you have a tile or textured tub, it’s likely that a mat won’t work. If you have a smooth surface tub, you’ll still need to soak your bath mat in hot water for 5 minutes to get the suction cups ready. Then you should be able to get them to adhere to the tub. Just getting them wet first doesn’t always work, so keep that in mind.