I noticed a certain well known online retailer has the Colgate Overnight Whitening Pen for sale at a 50% discount (£10 instead of £20)
Has anyone tried these?
Do they work?
A lot of their reviews say No, and they advise using for 35 days!!
A simple idea is to brush your teeth with Turmeric powder, leave for 5 mins and then brush teeth with toothpaste
good resuts after 5 days. Google it for more info