I just used this unit for the first time yesterday evening. The unit quietly hums but there is no movement of the water. Is the unit defective?

You don't see movement. However, put one finger in the unit while it is on and you should notice the vibrations. If you don't, then something is wrong. But just looking at it, no, the water doesn't move.

Can this be used with a flex denture? I can't use toothpaste, mouthwash or cleaning tablets because the denture will change color.

I use it on my flex bridge with Val-Clean made for this type of denture. Buy it at valclean.com for ½ the price on Amazon. I've been using it for many years now. They get clean and still flexible.

When this item is used to clean a night guard, should it be used every day? I typically just brush my night guard with my toothbrush & toothpaste every morning, but do a weekly soak in a glass with denture cleaner. Do you add any sort of cleaning agent when using this item? Thanks!

I use mine for my night guard. My dentist says all of these 'expensive' cleaners are unnecessary. Use distilled water and 1/4 teaspoon of baking soda and clean your retainers or dentures every night. I do this and once a week I brush my retainers with my toothbrush... they have been very clean and undamaged for years. Saves money and it works... I like a win-win.

Has anyone owned this for over 2 yrs. From the review, it breaks down too easily. Anyone know model that will last me more than 5 yrs for

I bought mine July 2018, and it broke Oct 2020. I didn't use it frequently either. It does a great job but isn't durable. So, based on my experience, it will not last even 2 years.

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iSonic F3900 Ultrasonic Retainer Cleaner Machine for Dentures & Aligners

Product ID: 1420175

Details

Brand
iSonic
Power Source
Corded
Product Benefits
Deep cleans
Special Feature
Timer
Unit Count
1 Count

🔊42 kHz ultrasonic power

⏲️5-minute auto shutoff timer

🛡️durable stainless steel tank

EC$390

Duties & taxes included

In stock

Sold byAmazon Antigua and BarbudaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

✨ Elevate your dental hygiene game with ultrasonic precision! 🦷

COMPACT YET MIGHTY - Sleek 200 ml stainless steel tank fits all dental appliances without taking up desk space.
PRO GRADE DURABILITY - Hard-wired design with a leak-resistant tank built to last through daily use.
SET FORGET CONVENIENCE - One-touch operation with a 5-minute automatic cycle—perfect for busy professionals.
TABLET ENHANCED CLEANING - Compatible with iSonic CTAR01 tablets for a next-level deep clean that your smile deserves.
EFFORTLESS ULTRASONIC POWER - 42 kHz frequency blasts away stains & odors for a pristine clean every time.

The iSonic F3900 Ultrasonic Retainer Cleaner delivers professional-grade 42 kHz ultrasonic cleaning in a compact, easy-to-use device. Designed specifically for retainers, aligners, dentures, and mouth guards, it features a durable stainless steel tank, a 5-minute automatic shutoff timer, and compatibility with iSonic cleaning tablets to ensure a deep, effortless clean every day.

Specifications

ASIN	B00HLBW61C
ASIN	B00HLBW61C
Additional Features	Timer
Best Sellers Rank	#20,549 in Health & Household ( See Top 100 in Health & Household ) #40 in Denture Cleansers
Brand Name	iSonic
Color	Machine Only
Customer Reviews	4.2 4.2 out of 5 stars (5,600)
Global Trade Identification Number	00804879261940
Included Components	plastic tray, sample iSonic White denture cleaning crystal, iSonic AlignerClean
Item Dimensions	7.1 x 5 x 5 inches
Item Weight	2 pounds
Item model number	F3900
Manufacturer	iSonic
Manufacturer	iSonic
Manufacturer Part Number	F3900
Manufacturer Warranty Description	One-year warranty for parts and labor. Customers within the continental USA pay one-way shipping, customers outside of continental USA pay 2-way shipping for warranty repairs., Only Amazon and Joy4Less are our authorized dealers on Amazon for this product. Purchasing from unauthorized dealers voids the warranty automatically.
Material Type	Electronics, Plastic, Stainless Steel
Model Name	isonic_f3900
Model Number	F3900
Power Source	Corded Electric
Product Benefits	Deep cleans dentures, aligners, retainers, night guards, mouth guards etc.
Product Dimensions	7.1 x 5 x 5 inches; 2 pounds
Recommended Uses For Product	Daily Cleaning, Deep Cleaning
Tank Volume	0.2 liters
Target Use Body Part	Teeth
UPC	662712236087 804879261940
UPC	662712236087 804879261940
Unit Count	1 Count

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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EC$390

Duties & taxes included

In stock

Sold byAmazon Antigua and BarbudaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Antigua and Barbuda.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Smooth transaction and product arrived in perfect condition.

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