A few years back we had a new bathtub installed.It has made into the tub a gritty feel at a certain spot to help keep you from sliding, instead of using a mat. I forgot to mention it is white and over the years the gritty spots have become dark colored no matter how hard I try to clean them or what I clean them with. I have tried using straight bleach to get it back to normal and nothng seems to help. Any suggestions? Thank you
- posted
17 years ago