The water tank is small. It needs to be filled every other day.
Response from waterpik.comBy WaterPik, Product Support, July 21, 2022
Hi Frankenstein - Thank you for your feedback. Keep in mind, as indicated in the instruction manual, the reservoir should be emptied after each use. It is not designed to store water for long periods of time. Call 1-800-525-2774 or email smreviews@waterpik.com with any questions you have.
i've had other waterpik flossers. i'm not quite as enamored with this model as i was with my past model. hoping it will grow on me the real test will be the upcoming dental app't to see what their comments are on how this unit is performing.
I was disappointed with the low pressure and extremely bad battery charge. The battery only lasts a couple days.
Response from waterpik.comBy WaterPik, Product Support, August 16, 2022
Hello C. Walker - We are sorry that you are disappointed with the model. The pressure for this model is not as powerful as our counter top models, however; this does not make it any less effective. As for the charging, we recommend charging the unit for 8-10 hours/overnight every 7 uses. It does come with a two-year warranty, should you have any issues please contact us at 1-800-525-2774 or email smreviews@waterpik.com.