If you have just purchased the Sejoy water flosser, you are on your way to achieving a deeper clean than traditional flossing alone. This cordless oral irrigator features five cleaning modes, four specialized nozzles, and a generous 350ML water tank designed to remove plaque and debris from hard-to-reach areas. Learning how to use the Sejoy water flosser correctly ensures you get the most effective clean while avoiding common mistakes that can reduce performance or cause discomfort. This guide covers everything you need, from initial setup to daily technique and long-term maintenance.
Charge Your Sejoy Water Flosser Before First Use
Before using your Sejoy water flosser for the first time, you must fully charge the battery to prevent unexpected power loss during cleaning.
Plug In for a Full Charge
Connect the included USB cable to the device and any standard power source such as a wall adapter, laptop, or power bank. A complete charge takes approximately 4 hours. The battery indicator will display a full charge when complete. Never use the device while it is charging, as this poses a safety risk.
Charge Before Travel Tip: A fully charged Sejoy water flosser lasts up to 30 days with twice-daily use, making it ideal for trips.
Fill and Attach the Water Tank Properly
The 350ML detachable tank provides enough water for approximately 2 minutes of continuous flossing, covering your entire mouth in one fill.
Fill with Warm Water
Pull the transparent water tank straight off the main unit. Fill with warm water, avoiding hot water which can damage internal components. You may add diluted mouthwash at a 1:1 ratio with water for added freshness. Do not exceed the MAX fill line marked on the tank. Reattach the tank securely until it clicks into place.
Seal the Base Cover
Ensure the base cover is tightly closed before use. A loose seal causes leakage, particularly when using the device in the shower.
Visual Check: The tank is properly attached when no gaps appear between it and the handle.
Choose and Install the Right Nozzle
The Sejoy C12 includes four nozzle types, each designed for specific oral care needs.
Select the Appropriate Nozzle
| Nozzle Type | Best Use |
|---|---|
| Standard Jet Tip | Daily plaque removal and general flossing |
| Orthodontic Tip | Cleaning around braces, retainers, and wires |
| Periodontal Tip | Targeting gum pockets for gum disease care |
| Tongue Cleaner | Removing bacteria to freshen breath |
Install Securely
Insert the nozzle into the top of the flosser and push gently until you hear a click, indicating a secure fit. To remove the nozzle, press the jet tip release button near the base and pull gently. Never pull forcefully without pressing the release button first.
Replacement Schedule: Replace all nozzles every 3 months or sooner if cracked, bent, or clogged.
Select Your Ideal Cleaning Mode
Starting with the correct pressure setting prevents gum discomfort and ensures effective cleaning.
Cycle Through Five Modes
Press the Mode button to switch between the five available settings. Soft mode operates at 60psi and works best for sensitive gums or beginners. Normal mode at 90psi is ideal for everyday cleaning. Strong mode at 110psi provides deep cleaning for stubborn plaque. Pulse mode alternates between 60 and 110psi to massage gums and improve circulation. DIY mode allows customizable pressure from 50 to 120psi across 10 adjustable gears.
Use DIY Mode for Custom Pressure
Long press the Mode button to enter DIY mode. Short press to adjust between the 10 pressure levels. Level 1 provides 50psi while level 10 delivers 120psi. This mode lets you fine-tune intensity based on your comfort level and cleaning needs.
Beginner Tip: Start with Soft mode to acclimate to the sensation before trying higher pressure settings.
Master the Proper Flossing Technique
Correct technique ensures thorough cleaning without excessive splashing or gum irritation.
Position Yourself Correctly
Lean forward slightly over the sink. Place the nozzle tip in your mouth, aiming at the gum line and between teeth. Close your lips partially, just enough to reduce spray while allowing water to flow out into the sink.
Floss Each Section Systematically
Turn on the device and begin at the back molars. Move forward along the upper arch, pausing for 1 to 2 seconds per tooth to let the water dislodge debris. Repeat on the lower arch. Guide the nozzle in a sweeping motion along the gum line and angle the tip between teeth to flush out plaque and food particles.
Total Cleaning Time: Aim for approximately 2 minutes to cover all areas thoroughly.
Use Specialized Nozzles for Specific Needs
Each nozzle serves a unique purpose. Using the correct nozzle maximizes cleaning effectiveness.
Clean Around Braces
Use the Orthodontic Tip with the angled end positioned near brackets and wires. Switch to Strong or DIY mode for deeper cleaning around orthodontic hardware.
Target Gum Pockets
Use the Periodontal Tip on Soft or Normal mode. Direct the stream into the spaces between teeth and gums to help reduce inflammation and bacterial buildup.
Freshen Your Tongue
After flossing, switch to the Tongue Cleaner nozzle. Glide it from back to front along the tongue surface to remove odor-causing bacteria.
Clean and Rinse After Each Use
Proper shutdown and cleaning prevents clogs and maintains hygiene.
Power Down and Spit
Turn off the device. Remove the nozzle and spit any remaining water into the sink. Rinse your mouth with water if desired.
Empty and Clean the Tank
Detach the water tank and empty all remaining water. Wash with mild soap and warm water, then rinse thoroughly and air dry before reattaching.
Clean the Nozzle
Rinse the nozzle under running water immediately after each use. Monthly, soak the nozzle in a 1:1 vinegar-water solution for 10 minutes to remove mineral buildup. Inspect for cracks or clogs and replace if damaged.
Important: Never soak the main unit in water. Only wipe it with a damp cloth.
Store Your Flosser for Long-Term Use
Proper storage extends the life of your Sejoy water flosser.
Air Dry Before Storing
Let the tank, nozzle, and connection area dry completely before reassembling. Store upright or in a protective case to prevent dust accumulation.
Charge Before Long Storage
If you will not use the device for weeks, fully charge it first. Store in a cool, dry place away from direct sunlight. Use only the original USB cable or a certified replacement to avoid charging issues.
Troubleshoot Common Sejoy Water Flosser Issues
Quick fixes address the most frequent problems users encounter.
Device Will Not Turn On
Low battery causes this issue. Charge the device for a full 4 hours.
Weak Water Pressure
This problem has three common causes. A clogged nozzle requires cleaning or replacement. A low water level means you should refill above the MIN line. A too-gentle mode selection requires switching to Strong or DIY mode.
Water Leaking from Base
A loose tank or base cover causes leakage. Reattach the tank firmly and tighten the base cover before each use.
Nozzle Stuck or Difficult to Remove
Mineral buildup or improper removal technique causes this issue. Always press the release button before pulling. Soak the connection in vinegar solution and rinse if buildup is present.
Excessive Splashing
This happens when lips are too open or pressure is too high. Close lips slightly around the tip and reduce pressure by using Soft or Normal mode.
Maintain Peak Performance
Regular care keeps your flosser working like new.
Monthly Deep Clean
Soak nozzles in vinegar-water solution for 10 minutes. Flush the tank with the same solution, then rinse well. Gently wipe the charging port with a dry cotton swab.
Monitor Battery Health
Recharge when pressure drops or the device fails to start. Avoid leaving the device plugged in for days after reaching full charge.
Replace Nozzles Every Three Months
Even if nozzles appear undamaged, they wear down and lose effectiveness. Keep extras on hand, especially if multiple family members share the device.
Frequently Asked Questions About Sejoy Water Flosser Use
How long does the Sejoy water flosser battery last?
On a full charge, the Sejoy water flosser lasts up to 30 days with twice-daily use. A complete charge takes approximately 4 hours.
Can I use mouthwash in my Sejoy water flosser?
You may add mouthwash or dental rinse diluted 1:1 with water. Avoid using hot water or undiluted mouthwash, as this may damage internal components.
How often should I replace the nozzles?
Replace all nozzles every 3 months or sooner if they become cracked, bent, or clogged. Regular replacement ensures optimal cleaning performance and hygiene.
Is the Sejoy water flosser waterproof?
The device has an IPX7 waterproof rating, meaning it can be safely used in the shower. However, do not submerge the main unit in water despite this rating.
Can I use the Sejoy water flosser with braces?
Yes, the included Orthodontic Tip is specifically designed for cleaning around braces, retainers, and other dental appliances. Use on Strong or DIY mode for best results.
What pressure mode should beginners use?
Beginners should start with Soft mode at 60psi to acclimate to the sensation. You can gradually increase to Normal, Strong, or DIY mode as you become more comfortable.
Key Takeaways for Using Your Sejoy Water Flosser
Using the Sejoy water flosser correctly transforms your oral hygiene routine by reaching areas traditional flossing misses. Charge fully before first use, select the appropriate nozzle for your needs, and start with Soft mode if you are new to water flossing. Clean the tank and nozzles after each use, perform monthly deep cleaning with vinegar solution, and replace nozzles every three months for optimal performance. The device is travel-friendly with its cordless design and 30-day battery life, making it easy to maintain your routine away from home. Pair your Sejoy water flosser use with regular dental checkups for comprehensive oral health care.