My dentist recommended the Philips Sonicare - I've used it for over a year and the 'pockets' that were appearing at my gumline have gone. I clean my teeth with an electric toothbrush, and then fill the pick reservoir with warm water. Absolutely vital as others have said to put it in your mouth and close your lips round it before starting - a wet face will result if you don't. It is surprising how much debris appears even after brushing, and plaque, which is grey, is also removed. I can't use the interdental brushes as they seem to get stuck between my teeth and then I panic that I might pull a crown off or a filling out. My water pick is great - it has helped dental hygiene a great deal.