(checked 2026-10-10)Listing is the 7-tip ION (WF-12) with 7,368 ratings: 12% 1-star, 4% 2-star.
The most-recommended water flosser of 2026: a full-size countertop unit with 10 pressure settings and a battery base, so it needs no outlet while you use it. It is loud, and 16% of Amazon ratings are 1-2 stars, mostly over charging and battery failures.
Top complaints
- Battery or charging fails
Amazon's review summary says battery life and reliability get mixed feedback: some owners say it stopped working after two weeks, and others say units break after 10 months. 12% of Amazon ratings are 1-star. On Electric Teeth, a reader who ran three units at high intensity reported lifespans of 4-12 months; the reviewer called that far worse than expected and suggested a warranty claim.
- Loud
CNN Underscored calls it miniature-jackhammer loud, its only real gripe. Wirecutter says it sounds a little harsher than most flossers, at about electric-razor volume. Electric Teeth measured about 79-80 dB and calls it quite loud.
- Stiff nozzle rotation, small handle, no tip storage
Electric Teeth found the nozzle harder to rotate than on rivals and the small handle slightly awkward, and says it is too bulky for travel. Wirecutter notes there is no onboard place to store the extra tips.
Source: Electric Teeth, Wirecutter
What owners love
- Cleanest feel in testing
Wirecutter's testers unanimously chose it as the best countertop flosser for cleaning action. CNN found its pressure strong and consistent yet gentle on the gums.
Source: Wirecutter, CNN Underscored - No outlet needed while flossing
The base has a battery: CNET cites 28 days per charge and CNN up to four weeks. Wirecutter and CNET say it takes up less counter space than other countertop units.
- Easy to refill and clean, 3-year warranty
Wirecutter calls it one of the easiest flossers to refill and clean, with a wide, dishwasher-safe reservoir. Wirecutter and CNET both cite a three-year warranty.
Source: Wirecutter, CNET
- Noise bothers you
- You want the most reliable Waterpik (the corded Aquarius has far fewer low ratings)
- You want onboard tip storage
- Bathrooms without an outlet near the sink
- A countertop-strength clean in a smaller footprint
- Households sharing one base
Scores (tap for why)
What experts say
- Wirecutter (NYT): Top pick (updated 2026-08-28; tested the ION Professional): it made mouths feel cleanest and is easy to clean. Its flaws are a harsher-than-average sound and no tip storage.
- CNN Underscored: Best water flosser overall: strong yet gentle, with a 650 ml tank and the easiest handle to maneuver; noise is the only real gripe.
- CNET: Best overall: compact, with a 651 ml tank, six tips, ADA acceptance and 28-day battery; one of the pricier picks at $90.
- Good Housekeeping: Best overall (ION Professional, updated 2026-08-19): testers liked the ergonomic design and that it can sit anywhere on the sink.