I had trays made at the dentist and bought their expensive whitening syringes. I've now used two of them over months and it's barely worked at all. I've just looked up the brand online and it has really poor reviews! I used a different brand from a different dentist about 15 years ago and it worked great, I had completely white teeth. This stuff has maybe whitened by one grade with two fricking syringes.
The brand is Boutique Whitening.
Does anyone have a recommendation for a brand that works? I wish I could remember the other brand I used.