I finally thought to give Crest whitening strips a go! I ordered the 7 day routine from Ebay, which was only about £7.You put it on your upper and lower teeth and keep it there for 5 minutes. Simple! I’m only on day 4 now, and I’m not actually sure its working. Well I must say my teeth do look whiter, but not white! I will get back to you about this in a few days!