If your wetroom isn't draining correctly, there could be a few potential problems. For example, it is possible that there is a blockage in your drainage system. It's also possible that, if your wet room is suffering from standing water away from the drain, that your flooring has become damaged. That could mean the slight decline of your floor has become worn or flattened due to consistent use.

If your wet room isn't draining, the best thing to do is get in touch with a local plumber or drainage expert. They can identify any blockage in your system and ensure your drains are working as intended.