FAQ

Answers to the questions we hear most. Can't find yours? Contact us.

Will it keep holding a charge after a few months?

Battery life was the #1 complaint we found in reviews of other cordless flossers, so we cover it directly: every Dewfloss has a 1-year limited warranty. If it stops charging because of a defect within 12 months, we replace it. To protect the battery, charge it fully before first use and keep the charging port dry and covered when you rinse it.

How many times do I need to refill the tank?

The tank holds 280 ml (9.5 fl oz), larger than many travel flossers. Most people get through a full clean on one tank in Soft or Standard mode; if you go slowly or use Gum Care mode, you may need one quick top-up.

Is it too strong for sensitive gums? Will my gums bleed?

Start in Soft mode, which is designed for first-timers and sensitive gums, and aim the tip at a 90° angle to the gumline. Some people notice a little bleeding during the first days of any new flossing routine; if it continues beyond a week or two, check with your dentist.

Is it powerful enough compared with a countertop water flosser?

Dewfloss runs at 60–100 PSI across its three modes (manufacturer spec). Countertop units can go higher, but they need an outlet and counter space. If you want more power, switch to Standard or Gum Care and move the tip more slowly.

Can I use it in the shower?

It's built for wet bathroom use and you can rinse it under the tap, but don't submerge it, and keep the charging port cover closed around water. Using it at the sink is the easiest way to keep things tidy.

How do I keep water from spraying everywhere?

Put the tip in your mouth before you press the power button, close your lips around it and lean over the sink so the water drains out. Press the button again before you take it out.

Does it work with braces, implants, crowns or bridges?

Yes. The box includes an orthodontic tip with small bristles for brackets and wires; the standard and periodontal tips work around implants, crowns and bridges. If you've just had dental work, ask your dentist when it's okay to start.

How long does the battery last, and how do I charge it?

Up to 70 days per charge at 1 minute a day (manufacturer rating), from a 1200 mAh battery. It charges with the included USB cable from any USB wall adapter, laptop or power bank. The wall adapter isn't included.

How do I clean it, and can mold grow inside?

Empty the tank after every use and leave it open to air-dry. Once a week, wash the tank with warm soapy water and run clean water through the flosser for a few seconds. Never leave water standing in the tank for days.

How often should I replace the tips? Can my family share one Dewfloss?

Replace each tip every 3–6 months, or sooner if it looks worn. The flosser can be shared, but every person should use their own tip. That's why our 2- and 3-packs come with 5 tips per unit.

Do I still need string floss?

A water flosser is a convenient way to clean between teeth and along the gumline, and many people use it in place of string floss. Your dentist can tell you what works best for your mouth. Keep brushing twice a day.

Can kids use it?

Kids around 6 and older can use it with adult supervision in Soft mode. It isn't a toy; store it out of reach of small children.