Introduction
This manual provides instructions for the safe and effective use of your Mornwell Cordless Water Dental Flosser, Model F42-F1-02. Please read this manual thoroughly before first use and retain it for future reference.
Important Safety Information
- Do not immerse the charging base in water.
- Ensure the charging port cover is securely closed before using the device in wet environments.
- This device is intended for oral cleaning only. Do not use for any other purpose.
- Keep out of reach of children.
- Consult a dental professional if you have any oral health concerns before using this device.
- Do not use if the device or power cord is damaged.
Package Contents
Verify that all items are present in the package:
- Mornwell Cordless Water Dental Flosser (Main Unit)
- Standard Jet Tips (2)
- Ultrasonic Tip (1)
- Tongue Cleaner Tip (1)
- U-shaped Tip (1)
- USB Charging Cable (Adapter not included)
- Instruction Manual

Image: The Mornwell Water Dental Flosser main unit, accompanied by five interchangeable jet tips and a USB charging cable.
Product Overview
The Mornwell Cordless Water Dental Flosser is designed for effective oral hygiene, featuring multiple modes and interchangeable tips to suit various needs.

Image: A detailed view of the flosser's control panel, indicating Soft, Normal, Shoot, Pulse, and Custom modes, along with the detachable 300ml water tank.
Setup
1. Charging the Device
- Connect the USB charging cable to the charging port on the device.
- Plug the other end of the USB cable into a compatible USB power adapter (not included) or a USB port.
- The battery indicator lights will illuminate during charging. A full charge typically takes 3 hours and provides up to 40 days of use.

Image: The water flosser can be charged using a USB cable from various power sources, including laptops, power banks, wall adapters, and car chargers.
2. Attaching a Nozzle
- Select the desired jet tip for your cleaning needs.
- Insert the stem of the jet tip into the opening at the top of the flosser handle until it clicks into place.
- To remove, press the release button on the side of the handle and pull the tip out.

Image: An illustration of the five included jet tips: two Standard Tips for daily cleaning, one Ultrasonic Tip for plaque removal, one Tongue Cleaner Tip for fresh breath, and one U-shaped Tip for braces and wires.
3. Filling the Water Tank
- Open the water tank cover located on the side of the device.
- Fill the 300ml tank with lukewarm water. Distilled water is recommended to prevent mineral buildup.
- Close the water tank cover securely to prevent leaks.
- Alternatively, the entire bottom of the tank can be detached for easier filling and cleaning.

Image: The 300ml detachable water tank can be easily filled through a side opening or by detaching the bottom for thorough cleaning.
Operating Instructions
1. Powering On and Off
- Press the power button to turn the device on.
- Press the power button again to turn the device off.
2. Selecting a Mode
- With the device on, press the mode button to cycle through the available cleaning modes:
- Soft: For beginners and sensitive teeth.
- Normal: For daily cleaning.
- Shoot: For stubborn debris and deep cleaning.
- Pulse: For gum massage.
- Custom: Allows for personalized water pressure adjustment.
- The selected mode will be indicated by an illuminated light on the control panel.
- The device features a memory function that saves your last used setting.

Image: The flosser offers five distinct modes: Soft, Normal, Shoot, Pulse, and a Custom mode for personalized pressure settings.
Video: Demonstrates the selection of different cleaning modes on the Mornwell Water Dental Flosser, highlighting the personalized cleaning options.
3. Using the Water Flosser
- Lean over a sink and place the jet tip into your mouth, aiming it at the gumline at a 90-degree angle.
- Turn on the device.
- Guide the water stream along your gumline, pausing briefly between teeth.
- Allow the water to flow into the sink.
- Continue until all areas have been cleaned or the water tank is empty.

Image: A visual guide illustrating the five steps for using the water flosser: Add water, install tip, select mode, position in mouth at 90-degree angle to gumline, and press the power button to start.

Image: An illustration comparing the effectiveness of a dual-thread water stream (up to 1800 pulsations/min, 10-110 PSI) versus a single stream (up to 1200 pulsations/min, 30-100 PSI) in removing dental plaque.
Maintenance
1. Cleaning the Water Tank
- After each use, empty any remaining water from the tank.
- Detach the bottom of the water tank and rinse it thoroughly with water.
- Allow the tank to air dry before reassembling.
2. Cleaning the Jet Tips
- Remove the jet tip from the device.
- Rinse the tip under running water.
- Replace jet tips every 3-6 months, or sooner if they become worn.
3. Cleaning the Main Unit
- Wipe the exterior of the device with a soft, damp cloth.
- Do not use abrasive cleaners or harsh chemicals.
- The device is IPX7 waterproof, allowing for safe rinsing under a faucet, but ensure the charging port cover is sealed.

Image: The Mornwell Water Dental Flosser is IPX7 waterproof, making it safe for use in the shower or for rinsing under a faucet.
Video: Highlights the IPX7 waterproof rating and ergonomic design of the water dental flosser, showing its use and easy handling.
4. Storage
- Store the device in a cool, dry place away from direct sunlight.
- Ensure the water tank is empty and dry before storing for extended periods.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Low battery. | Charge the device for at least 3 hours. |
| Weak water pressure. | Water tank is low or empty. Jet tip is clogged. Incorrect mode selected. | Refill the water tank. Remove and clean the jet tip. Select a higher pressure mode. |
| Water leaks from the device. | Water tank not properly sealed. Jet tip not properly installed. | Ensure the water tank cover and bottom are securely closed. Reinsert the jet tip until it clicks. |
| Device stops working during use. | Battery is depleted. | Recharge the device. |
Specifications
- Model Number: F42-F1-02
- Water Tank Capacity: 300ml
- Pressure Range: 10–120 PSI
- Pulsations: Up to 2,000/min
- Modes: 5 (Soft, Normal, Shoot, Pulse, Custom with 8 pressure settings)
- Waterproof Rating: IPX7
- Battery Life: Up to 40 days on a single charge (3-hour charge time)
- Power Source: Battery Powered (USB rechargeable)
- Manufacturer: Prooral Health Technology (Shenzhen) Ltd
- Package Dimensions: 9.41 x 3.74 x 3.03 inches
- Item Weight: 1.08 Pounds
Warranty and Support
For warranty information and customer support, please refer to the documentation included with your product or contact Mornwell customer service directly. The product is designed for reliable performance for up to 3 years.
For further assistance, visit the official Mornwell store on Amazon: Mornwell Store





