Please?
We recently had a huge walk in shower with a wonderful non slip tray but it's always grubby looking. The fitter didn't clean it before he left and I have tried scrubbing with a dish brush and using bathroom cleaner but it's never coming up nicely.
Im reluctant to put bleach on it as I'm concerned about damaging it - probably being ridiculous, I know!!
Any tips on how to make it look a bit better or I am destined to have a dirty tray forever 