I've had good luck with Waterpiks. (Have two--one in the house and another in the apartment.) Years ago, I thought they were just another gadget, and I always just used floss. But when sunspot activity or something caused me to try a Waterpik, I was amazed at how much cleaner my mouth was. And I find them more comfortable on my teeth than floss. I use a setting about half way up--not too hard, not too soft--but enough to get the debris out.