I got samples of the Listerine dissolving strips when I went to the Durham Fair. I liked them alot. They dissolve and also freshen your breath.

I've also tried the kinds with the trays and gel. Couldn't use them because of my gag reflexes.

I used the Listerine strips twice a day, in the morning after brushing my teeth and at night before going to bed. I definitely noticed a difference after 2 days. I'd highly recommend them.