Chrome stain

[pooksahib]

I know this is not strictly DIY but perhaps someone who's seen a lot of bathrooms might know what's caused this weird mark on the chrome in my hand basin. It's circular, which suggests a pool of something has been sitting there but I can't think what. Also, there's nothing to feel with a fingertip - the chrome is smooth to the touch all over. Vinegar/baking soda have had no effect.

Many thanks for any suggestions offered.

 

[jj4091]

Bleach might have caused it, you will never recover it & need to replace.

 

[jeff the gasman]

Denture cleaner.

 

[Old Salt]

Denture cleaner.

Which contains bleach

 

[CBW]

Oddly looks like one of those blue protective stickers.

 

[pooksahib]

Thanks everyone.

 

[JohnD]

Might also be an acidic limescale remover, they need go be rubbed off and rinsed away after a minute or two

Sometimes you can clean off stains with a white nylon pan scourer

 

[pooksahib]

Sometimes you can clean off stains with a white nylon pan scourer

I've just taken the old sponge from the kitchen and used the 'nylon scourer' side (rubbed on a bar of soap) on my basin. It's done a fantastic job. Thanks, JohnD.