It's a tea&coffee stain (or maybe red wine...), small, surface only, and it's something I've had before.
In the past, my dentist just scrubs it with his whizzy brush and it's gone.
Is there anything I can get, say, at Boots to get rid of it? Would baking soda work (I swear I've read this somewhere but will wait until I get the go-ahead before trying it!!)
Anything to save a trip to the dentist and having to pay for, er, a quick scrub...