Who should use a water flosser?

Anyone ages 6+ can benefit from using a water flosser to clean deep between teeth and under the gumline where other products can't reach. It's also great for cleaning braces and other orthodontics, bridges, crowns, and dental implants.

Is it safe to add mouthwash or other additives in my water flosser?

Yes, but please do not exceed a 1:1 ratio of water to mouthwash. You can also add therapeutic mouth rinse (as prescribed by your dental professional) or hydrogen peroxide (3%). After, run a full reservoir of clean warm water though unit to rinse.

Can I purchase additional or replacement tips? Which flossing tips are included?

Genuine flossing tips are available separately; 3 tips for a variety of needs and multiple users included:

1 Precision Tip (JT-450E)

1 Plaque Seeker Tip (PS-100E)

1 Orthodontic Tip (OD-100E)

How do I charge the Cordless Gem 5100 water flosser?

LED flashes when battery is low and turns red when depleted

Connect cable to the unit (USB-C) and then to a standard USB adapter rated 5V, up to 3A (adapter not included)

LED pulses slowly while charging and becomes solid when fully charged

Is this product easy to clean and maintain? How do I remove the water reservoir?

Hold power handle & pull reservoir down to remove - clean in top rack dishwasher (air/non-heated dry) or hand wash

Monthly: Add 1 part white vinegar + 2 parts warm water to reservoir, run through unit; repeat with full reservoir of warm water only

From the manufacturer

aplus content video

How to Use the Cordless Gem Water Flosser

Ultra quiet and portable, the Cordless Gem 5100 water flosser (WF-27) is great for small bathrooms and is ideal for travel. It features a rechargeable design with up to 9 weeks of use per charge, a narrow grip for firm control, and is waterproof for shower use. With a single touch, EASYSPIN 360-degree tip rotation provides 3X the reach to easily access your whole mouth, even back teeth.* Travel Mode secures the device from turning on by accident while traveling. Simply press and hold the power button 5 seconds until the LEDs start flashing to enable/disable Travel Mode. This model comes with 3 flossing tips for a variety of dental needs (1 Precision tip for every day gum health, 1 Orthodontic tip for cleaning braces, 1 Plaque Seeker tip for cleaning around dental implants and bridges), 2 safe and effective settings (low/high), a microfiber travel bag, and a removable water reservoir with up to 60 seconds of flossing time. The included USB-C to USB-A cable (rated 5.0V DC, up to 3.0A) charges from a laptop, car, power bank, or wall adapter (USB-A wall adapter not included) and is global voltage compatible. The recharge indicator flashes white to indicate when the battery is getting low and turns red when it is depleted. Cordless Gem removes up to 99.9% of plaque that causes gingivitis, cavities, and bad breath from treated areas and is clinically proven up to 2X as effective as string floss for removing bacterial plaque and improving gum health. is the #1 water flosser brand recommended by dental professionals, and the Cordless Gem 5100 water flosser is accepted by the American Dental Association (ADA) for safety and effectiveness. Backed by a 2-year manufacturer's limited warranty, see product manual for details. *data on file

Product Description

Not all water flossers are the same. Choose the brand and take control of your oral health.

*Professional AAU, 400 dental professionals, October 2025

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