Works Well | Needs Hot Water to Dissolve
After reading other reviews, I filled the reservoir (see photo) with hot tap water, and dropped in a whitening tablet. After about 15 minutes, tablet is fully dissolved. After using the Waterpik for 4-5 days, it is time to refill with water. After flossing, I refill with hot water and add a tablet. Ready for the next few days. Works great! Read more














