How to Clean Your Aligners Properly: Dentist-Approved Guide (2025)

By Dr Sarah Mpi BDS, Cosmetic Dentist & Founder of Sereclean

Keeping your Invisalign or clear aligners clean isn’t optional, it’s essential. Clean aligners mean better oral hygiene, fewer smells, clearer trays, and a smoother aligner journey. As a dentist and the founder of Sereclean, I’ve seen everything from yellow, cloudy aligners to trays that smell like “gone-off milk.”
The good news? Keeping them clean is simple with the right routine.

This 2025 dentist-approved guide covers exactly how to clean your aligners properly, what not to do, and how to keep your trays crystal-clear from day one.

Why Cleaning Your Aligners Matters

Clear aligners sit tightly against your teeth for over 22 hours a day, so bacteria, plaque, and food debris can easily build up. If you don’t clean them properly, you’ll notice:

• A sour or “off” smell

• Yellow or cloudy staining

• Trapped plaque or biofilm

• Bad breath

• Increased risk of gum irritation

• White spots on teeth after treatment

Good hygiene = better results and healthier teeth.

Your 2025 Dentist-Approved Aligner Cleaning Routine

1. Rinse Them Every Time You Remove Them

Warm (not hot) water only.
This stops dry saliva and plaque from hardening on the aligner surface.

2. Never Use Toothpaste

This is still the most common mistake.
Toothpaste contains abrasives that scratch the plastic, making aligners cloudy and more prone to trapping bacteria.

Avoid:

• Toothpaste

• Baking soda

• Whitening toothpaste

• Anything gritty

3. Brush Gently With a Soft Toothbrush

Use a soft, separate toothbrush that’s only for your aligners.
Gently brush with water, no toothpaste needed.

This removes surface debris without damaging the trays.

4. Use an Ultrasonic Aligner Cleaner for a Proper Deep Clean

Ultrasonic technology uses high-frequency sound waves to break down debris, plaque, and bacteria in areas toothbrushes can’t reach, even micro-grooves in the plastic.

In 2025, ultrasonic cleaning is the gold standard for aligner hygiene.

If you choose an ultrasonic cleaner, make sure it is:

• Designed for dental appliances (not jewellery)

• Safe for plastics

• Large-tank (so trays aren’t forced into a tiny cup)

• Heat-controlled (overheating = distortions)

The Sereclean Pod was designed specifically for aligners, retainers, night guards, and even dentures, using safe ultrasonic frequencies with no risk of warping.

Use it once a day for a deep clean, and regular brushing/rinsing for maintenance.

5. Use Aligner Cleaning Tablets 1-3x Per Week

Cleaning tablets (like the Sereclean Aligner Tablets) dissolve surface stains and keep the plastic clear.

They’re perfect for:

• After meals

• Before changing to a new aligner

• Freshening aligners that smell

Just avoid using very strong denture tablets daily, they can be too harsh over time.

6. Always Store Aligners in a Clean Case

Never leave them:

• Wrapped in tissues (you’ll accidentally throw them away,  it happens daily)

• On the counter

• In a warm car

A dirty case = dirty aligners.
Clean your case daily with soap and water.

What NOT to Do (2025 Update)

Avoid these at all costs:

 Boiling water
 Hot water
 Toothpaste or baking soda
 Mouthwash (it stains green/blue)
 Bleach or household cleaners
 Ultrasonic cleaners meant for jewellery only
 Alcohol-based products

These can either damage the aligner surface or cause distortion.

Why Ultrasonic Cleaning Is Becoming the New Standard

Patients in 2025 want fast, effective, dentist-approved cleaning,  without harsh chemicals.

Ultrasonic cleaning offers:

• Deeper cleaning compared to brushing alone

• Removal of bacteria in invisible crevices

• Reduced staining and odour

• Better hygiene for long-term retainer wear

• Support for patients with poor manual dexterity

It’s also ideal for permanent retainers, night guards, and dentures, making it a multi-use investment.

How Often Should You Clean Your Aligners?

Here’s the ideal routine:

Rinse: Every time you remove them
Brush with soft brush: Twice a day
Ultrasonic clean: Once daily
Cleaning tablets: 1–3 times per week
Clean your aligner case: Daily

This keeps aligners fresh, clear, and hygienic throughout treatment.

Can Old or Stained Aligners Be “Restored”?

If your aligners already have:

• Thick plaque

• Heavy cloudy staining

• Odour that doesn’t go away

They’re usually too far gone.
Ultrasonic cleaning prevents this, but it’s not a miracle worker for years of build-up.

For best results:
Start using an ultrasonic cleaner from the day you receive your aligners.

Final Thoughts From a Dentist

Clear aligners rely on consistency, and so does your cleaning routine.
Aim for simple, quick habits that fit easily into your daily life.

If you want the safest, dentist-designed option for deep cleaning, the Sereclean Pod is built specifically for aligners, retainers, mouthguards, and dentures, with ultrasonic frequencies that are powerful but safe for plastics.

Keeping your aligners clean doesn’t need to be hard.
With the right routine, your teeth, gums, and aligners will thank you.