This is stressing me out.
I had trays fitted by a dentist and the gel but the trays seem to be loose and all saliva gets in (but I only realised this a year later when examining them to try and see why it wasn't working), the dentist now won't help.
Also using Crest strips which aren't helping. They don't seem to cling to my teeth very well.
They just seem to get darker and darker all the time. Not a wine drinker, smoker, or coffee/tea drinker either. No dental problems. Brush and floss twice a day.