Explore COSLUS FAQ for Instant Help

Sep 25, 2024 - To maintain hygiene, it is recommended to replace it once every 3 months. Removing the tip after each use and placing it in a ventilated area to dry is as advised. 24-month warranty of our products is provided (note: Extended to 24 months through extended warranty registration) , please feel free to contact us at: support@coslus.com or +1 855-594-3950

Sep 25, 2024 - At present, we don't provide a separate replacement tongue cleaner tip.You can directly visit the COSLUS Replacement Parts page based on the product to search for it. If you still cannot find it, you can contact our customer service team for consultation and recommendation.

Sep 25, 2024 - No, the product structures of each brand differ

Sep 25, 2024 - You need to use a screw (or any object that can fit into the hole) slightly larger than the nozzle hole and screw it in, then press and hold the nozzle removal button while gently pulling it out.

Sep 25, 2024 - The water flosser is compatible with power adapters that support an input voltage of 100V–240V and an output voltage of 5V. Using an adapter with an output voltage higher than 7V may activate the device’s protection system and prevent it from charging. If you are unsure which adapter to use or experience any charging issues, please [contact us] and provide your shipping country or region. Our customer service team will confirm the appropriate adapter and provide a suitable solution based on your location.

Sep 25, 2024 - The Coslus water flosser can help you clean and remove stains, food residue, and more, whether using water or hydrogen peroxide. Since everyone's oral condition is different, it is recommended to consult your dentist before use to see if it is suitable for you.

Sep 25, 2024 - If you are using it for the first time, it is recommended that you hold it close to your teeth to avoid splashing.

Sep 25, 2024 - You can contact our customer service team, we will recommend the purchase link for you.

Sep 25, 2024 - Yes, the product has met the certification requirements and is safe for air travel.

Sep 25, 2024 - As long as the output port is a USB interface and the output voltage is 5V, it can be supported.

Sep 25, 2024 - A water flosser and a toothbrush each fulfill distinct, complementary roles in oral hygiene. While a toothbrush ensures the fundamental cleanliness of tooth surfaces, a water flosser effectively tackles concealed areas like those beneath the gums, within fissures, and around cavities.

Sep 25, 2024 - If there is bleeding during your initial experience, it is normal. It is recommended to use the gentle mode and continue using it for a week, which can effectively promote gum health. If bleeding persists, it may indicate oral issues such as gingivitis, and it is advisable to consult a dentist.

Sep 25, 2024 - The correct steps for use are: install the tip - fill it with water - adjust the mode - put it into your mouth, align it at 90° with the gum line - turn on the switch and start flossing.

Sep 25, 2024 - Dentists recommend using the water flosser for 1 minute each time, no more than 3 times a day. The water flosser will automatically shut down after 2 minutes by default. It is recommended not to use it for more than 5 minutes within 2 hours.

Sep 25, 2024 - The power consumption varies across different settings, and most customers have reported that it can last for more than a month.

Sep 25, 2024 - Yes. By registering through the warranty page, you can obtain a 24-month warranty service.

Sep 25, 2024 - It is not suitable for rinsing the nose, as it will irritate and damage your nasal cavity.

Sep 25, 2024 - For sensitive individuals, it is recommended to use warm water not exceeding 40°C, which can make the water flossing process gentler, more comfortable, and less irritating.

Sep 25, 2024 - You can add regular mouthwash to the water tank, but it is recommended that the ratio does not exceed 1:1. After use, rinse the water tank thoroughly with clean water.

Sep 25, 2024 - This product does not include an charger. You can use an charger at home with 5V 1A and a maximum of no more than 2A. It can be fully charged in 4 hours. The product cannot be used simultaneously during the charging process. Please unplug the power as soon as possible after charging. Do not keep it charging all the time to prevent battery damage.

Sep 25, 2024 - Consistent use of a water flosser can deeply clean the oral cavity and prevent the formation of dental tartar. If dental tartar has already formed, it is necessary to undergo teeth cleaning treatment at a formal hospital.

Sep 25, 2024 - Apologies for any inconvenience caused. You can extend the warranty service to 24 months by registering for the extended warranty and then contact our customer service team. We will provide a free replacement.

Sep 25, 2024 - It is recommended to use the periodontal tip and start with a lower water pressure, gradually increasing it to find the most suitable pressure level.

Sep 25, 2024 - For a better customer experience and to meet the oral cleaning needs at different angles, the tip can be adjusted to the angle you want for use.

Sep 25, 2024 - For your safety and health, bleach cannot be used.

Sep 25, 2024 - Before starting the cleaning process, ensure that the water flosser has been disconnected from the power source to avoid electrical shock or other safety issues.

Removing the Jet Tips: Depending on the design of the water flosser, detach the jet tips from the main unit. Some nozzles can be rotated and removed directly, while others may require pressing or unlocking a button.

Cleaning the Jet Tips: Place the jet tips in warm water and gently scrub the inner and outer surfaces of the nozzle, especially the water outlet holes, using a soft brush or toothpick. Ensure that all residue and dirt are thoroughly removed.

Disinfecting the Jet Tips: If necessary, soak the jet tips in a disinfectant solution for a period of time, following the instructions provided with the disinfectant. Then rinse it thoroughly with water.

Cleaning the Water Reservoir: Remove the water reservoir from the main unit and clean the inner and outer surfaces with warm water and a neutral detergent, ensuring that all dirt and bacteria are thoroughly removed. Then rinse it thoroughly with water.

Wiping and Drying: Use a clean towel or paper towel to wipe the nozzle and water reservoir, ensuring they are completely dry. Then place them in a well-ventilated area to air dry.

Installing the Jet Tips: Once the jet tips and water reservoir are completely dry, reinstall the nozzle onto the main unit according to the water flosser's usage instructions.

Cleaning the Main Unit: Use a clean, damp cloth to wipe the surface of the water flosser's main unit, ensuring that dirt and fingerprints are removed.

Sep 25, 2024 - You can use a long and thin brush to clean it.

Sep 25, 2024 - Yes.

Sep 25, 2024 - In most cases, it can be fully charged in about 3 - 4 hours.

Mar 11, 2026 - No. Currently, only the following COSLUS water flosser models are ADA Accepted: E40, C20, C50, and C51.

Sep 25, 2024 – The currently available water flosser products, F5020E, FC5360, and T40, have all obtained BPA FREE certification.

Sep 25, 2024 - Apologies for any inconvenience caused. You can extend the warranty service to 24 months by registering for the extended warranty and then contact our customer service team. We will provide a free replacement.

Sep 25, 2024 - 1. Make sure the tip fits perfectly with the water tank: the correct way to insert the tip is to press the release button - insert the tip - hear the insertion prompt sound - release the button. 2. If the problem is not solved, please contact our customer service team for consultation.

Sep 25, 2024 -

Preliminary troubleshooting:

1. Press ON/OFF to check if the indicator light turns on. If the indicator light does not light up, recharge the product. If the indicator light still does not light up after charging, it indicates a product malfunction. Please contact C0SLUS official customer service for assistance.
2. If the product's charging indicator light is on, but the motor does not work, it indicates a product malfunction. Please contact C0SLUS official customer service on the website for assistance.
3. Why isn't water spraying out to clean my teeth during product operation?

• Fill the water tank completely and turn the product upside down to operate, preventing negative pressure. Let it run for about 2 minutes.
• Check if the water tube is cracked. If the water tube is cracked, water may not be drawn out when the product is tilted, or there may be a reduction in water volume.
• Check if the tip is clogged. Use another nozzle to see if the water pressure is consistent. If it is not, the nozzle may be clogged.

Sep 25, 2024 -

Preliminary troubleshooting:

1. Check if the output voltage of the charger is DC 5V to avoid using the wrong charger that may cause the device to fail to charge.
2. You can use another DC 5V adapter to check if it can charge the device.
3. Ensure that the charging port of the product remains dry. If the product is wet, its built-in protection function may activate to protect itself, resulting in the inability to charge.
4. Check if there are any issues with the data cable. Try shaking the data cable 5 times while it's inserted into the device to see if there is any poor contact. 5. If none of the above solutions work, please contact COSLUS official customer service for assistance.

Sep 25, 2024 - The water pressure ranges from 30 to 120 PSI