tooth whitening pens - anyone used one? - do they work?

[treacletart]

or are they just hope in a felt-tip?

Useless Your better buting whitening toothpaste. I think 'Hollywood smile' or something is the best one ive used so far.

I bought the Rapid White brush on thing - absolute rubbish. I sent it back for a full refund. Haven't ever checked to see if I got one Doh!