On 20/02/2018 09:39, Tim Watts wrote:

Trust me - everyone cleans their baths in bleach - diluted of course...
The only things, outside of weird organic solvents, that damage plastic
baths to my knowledge are abrasive cleaners.

I don't, the hard water leaves limescale so a mild acid works better
than bleach.

The only thing bleach is useful for on baths is if you need to get rid
of mould on the silicone.