Grinest FL-V35
Grinest Water Dental Flosser Instruction Manual
Model: FL-V35
1. Product Overview
The Grinest Water Dental Flosser is a rechargeable, cordless oral irrigator designed for effective teeth cleaning. It features multiple flossing modes and comes with various jet tips for comprehensive oral hygiene.

Image: Grinest Water Dental Flosser and its included components.
Key Features:
- 4 Professional Flossing Modes: Includes Standard (40-60 psi), Massage (60-80 psi), Point Control (100-120 psi), and DIY Mode (40-130 psi) for customized cleaning.
- IPX7 Waterproof Design: Allows for safe use in the shower and easy cleaning.
- Portable and Lightweight: Ideal for home use, office, business trips, or travel.
- 320ML Large Capacity Water Reservoir: Provides up to 60 seconds of continuous flossing without refilling. The tank is removable for easy cleaning.
- Long Battery Life: Equipped with a 2000mAh lithium battery, offering up to 30 days of continuous use on a single charge.
- 6 Replacement Jet Tips: Includes 3 Standard Jet Tips, 1 Orthodontic Tip, 1 Tongue Cleaner Tip, and 1 Toothbrush Head for diverse oral care needs.
- 360° Rotatable Nozzle: Ensures extensive all-round oral cleaning.

Image: Detailed explanation of the four flossing modes and their pressure ranges.

Image: Information on the 2000mAh battery life and various charging methods.

Image: Visual representation of the IPX7 waterproof rating, suitable for shower use.

Image: Illustration of the 320ML large capacity detachable water tank and two ways to refill it.

Image: Close-up of the 360° rotatable nozzle and ergonomic handle design.

Image: Overview of the 6 included replacement jet tips, each designed for specific cleaning needs.
2. Setup Instructions
Initial Charge:
Before first use, fully charge the dental flosser for approximately 4 hours. Ensure the charging port cover is securely in place when not charging, especially in wet environments.
Filling the Reservoir:
- Detach the water reservoir from the main unit by unscrewing it or opening the tab at the back.
- Fill the 320ml reservoir with water or a suitable mouthwash.
- Reattach the reservoir securely to the main unit.
Attaching a Nozzle:
- Select the desired jet tip (e.g., Standard, Orthodontic, Tongue Cleaner, Toothbrush Head).
- Insert the chosen jet tip into the opening at the top of the flosser handle until it clicks into place. Ensure it is firmly seated.

Image: Visual guide for filling the tank, installing tips, and starting the device.
3. Operating Instructions
Selecting a Mode:
- Press the mode selection button to cycle through the 4 professional water stream settings: Standard, Massage, Point Control, and DIY Mode.
- For DIY Mode, adjust the water pressure freely between 40-130 psi to meet your specific needs.
Flossing Technique:
- Lean over a sink to avoid splashing.
- Place the jet tip into your mouth, aiming it at the gum line at a 90-degree angle.
- Press the power button to turn on the device.
- Move the tip along the gum line and between teeth, pausing briefly on each tooth to allow water to clean the area thoroughly. The nozzle can rotate 360 degrees for comprehensive cleaning.
- Do not take the water flosser out of your mouth while it is working to prevent splashing.
Reminder: For customers with dentine hypersensitivity, it is recommended to use a water pressure range of 40-80 PSI to prevent discomfort.

Image: Benefits of using the water flosser for various oral health issues like bleeding gums, dental plaque, and sensitive teeth.
4. Maintenance and Cleaning
Cleaning the Reservoir:
- After each use, empty any remaining water from the reservoir.
- The reservoir is detachable and can be easily cleaned with water and mild soap. Rinse thoroughly.
- Allow the reservoir to air dry completely before reattaching or storing.
Cleaning Jet Tips:
- Remove the jet tip from the flosser.
- Rinse the jet tip under running water. For thorough cleaning, you may use a soft brush.
- Store jet tips in a clean, dry place.
General Care:
- Wipe the main unit with a soft, damp cloth as needed.
- Do not submerge the entire unit in water, despite its IPX7 rating, to protect internal components.
- Ensure the charging port cover is sealed when not charging to maintain waterproof integrity.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Low battery. | Charge the device for at least 4 hours. |
| Weak water pressure. | Low battery; insufficient water in reservoir; incorrect mode selected. | Charge the device; refill the reservoir; select a higher pressure mode (e.g., Point Control or adjust DIY mode). |
| Water leakage from the base. | Reservoir not properly sealed or damaged. | Ensure the reservoir is screwed on tightly. If leakage persists after ensuring proper sealing, contact customer support. |
| Jet tip falls off during use. | Tip not securely attached. | Ensure the jet tip is fully inserted and clicks into place before use. |
6. Product Specifications
| Feature | Detail |
|---|---|
| Brand | Grinest |
| Model Number | FL-V35 |
| Power Source | Battery Powered (1 Lithium Ion battery required) |
| Water Reservoir Capacity | 320 ML |
| Flossing Modes | 4 (Standard, Massage, Point Control, DIY) |
| Pressure Range | 40-130 PSI (adjustable in DIY mode) |
| Waterproof Rating | IPX7 |
| Special Features | Cordless, Portable, Rechargeable, Waterproof |
| Product Benefits | Removes Plaque |
| Package Dimensions | 9.45 x 4.45 x 3.31 inches |
| Item Weight | 1.01 Pounds |
| UPC | 757611386923 |
| ASIN | B0CDKM3L95 |

Image: Contents of the product packaging, including the flosser, various tips, and charging cable.
7. Warranty and Support
Warranty Information:
The Grinest Water Dental Flosser comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and issues arising from normal use.
Customer Support:
For any questions, concerns, or warranty claims, please contact Grinest customer service. Our team is dedicated to resolving any problems to your satisfaction.
Please refer to the contact information provided on the product packaging or the official Grinest website for the most current support details.
Safety Information:
- Do not use the device with a broken or damaged charging cable.
- Keep out of reach of children.
- Do not submerge the entire unit in water.
- Consult a healthcare professional before use if you have certain medical conditions, such as dentine hypersensitivity or severe gum disease.
- Always follow the instructions provided in this manual for safe and effective use.