Ultrasonic Cleaner vs. Cleaning Tablets: Which Is Better for Retainers?

There are two common ways to deep-clean a retainer, aligner or night guard at home: soaking it with a cleaning tablet, or running it through an ultrasonic cleaner. They work differently, and many people end up using both.

How cleaning tablets work

A tablet dissolves in water and releases cleaning agents that loosen film and stains while the appliance soaks. Tablets are inexpensive per use, need no power, and travel well. The trade-off is that soaking is passive, so heavy buildup in grooves can take repeated soaks.

How ultrasonic cleaners work

An ultrasonic cleaner sends high-frequency sound waves through water. The waves form tiny bubbles that collapse against the surface of the appliance and shake debris loose, including in places a brush cannot reach. A cycle usually takes a few minutes. The trade-off is the upfront cost and counter space.

Side by side

• Upfront cost: tablets are lower; an ultrasonic cleaner is a one-time purchase.

• Ongoing cost: tablets are bought again and again; an ultrasonic cleaner can run on plain water.

• Effort: both are hands-off once started.

• Travel: tablets are easier to pack.

• Hard-to-reach areas: ultrasonic cleaning is the stronger option.

Using both

Many people run an ultrasonic cycle for everyday cleaning and add a tablet when they want a deeper clean or a fresher result. If you want to try that, see our ultrasonic retainer cleaner and retainer cleaner tablets.

Always follow the care instructions from your orthodontist or the maker of your appliance.