The Pik Pocket tip that I ordered separately sometimes falls off, I think from the antibacterial mouthwash I use (active ingredient is Cetylpyridinium chloride). I was told that air bubbles can cause the tip to eject, and the mouthwash does get bubbly. Eventually, after attempting to use it several times and pouring water into the tip port, without the tip, in an attempt to clean it, the Pik Pocket tip will stay in. I read somewhere in Waterpik's literature that non-alcoholic mouthwash should work, but in my opinion, it works so poorly when the Pik Pocket tip is used due to the required cleaning procedure to prevent the tip from falling out that they should alert customers to this issue. I suggested a latch in addition to the current locking mechanism to assure the tip won't come out. Also, maybe Waterpik should consider making their own brand of non-alcoholic mouthwash without a foaming agent that will work with the Pik Pocket tip.
The requirement to line the battery cover gasket with petroleum jelly whenever the batteries are changed is annoying. Twice the cover couldn't be opened by hand even after I turned it to the right position. Maybe I needed to use more petroleum jelly those two times.
The clearest design flaw may be that the water reservoir soon became impossible to put back on. Sometimes I remove it for a good cleaning and it has to be removed to change batteries. Pressing it hard and even hitting the bottom wouldn't work at one point. Then I discovered that a plastic piece that's part of the white housing, that has to engage with the clear water reservoir, was positioned too far forward and the water reservoir couldn't be pushed in far enough to engage. I had to file down the front of that plastic piece and now it's perfect.
No, I would not recommend this to a friend.
Response from waterpik.comBy Waterpik, Product Support, December 21, 2020
We are sorry for the difficulty that you encountered with the product. We appreciate your feedback and will make sure to pass it on to our product Design Team. The unit does come with a one year warranty. If you are still having issues with the product, please let us know! You can email us at smreviews@waterpik.com or call us at (800) 525-2774 for assistance.
I had a larger plug in Waterpik unit that began to leak and had no idea how to fix it. It also was too large to fit on my bathroom sink. I saw this smaller version and thought it would be great. The power is less than the plug in unit and the batteries die very quickly. Also, the water holding container is not large enough to completely water floss your entire mouth. While I like the size, I am disappointed in the performance.