Dry teeth
Twist bottom of pen clockwise to start flow - click until get appears in brush
Apply a thin layer of yt :) to the upper and lower teeth
Do not eat or drink for 30 minutes. For best results apply 3 times daily for 2 weeks only. For ongoing maintenance, use one week out of 3 months
Apply last thing at night and first thing in the morning for even better results.

For Express Whitening:

Apply yt:) every 15 minutes for 2 hrs and then once daily every other day.

NB: Do not consume high coloured foods or drinks directly after whitening.