Why Your Invisalign Goes Cloudy — And How to Keep It Invisible

Clear Aligner Care

Why Your Invisalign Goes Cloudy — And How to Keep It Invisible

The fog isn’t the plastic wearing out. It’s a film you can lift.

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You paid for invisible. By day five it’s foggy, filmy, and you’re covering your mouth. Five reasons why — and the fix.
The Source
01

Cloudy is a film, not wear.

A thin biofilm settles into the plastic and the grooves around each tooth — and that film is what scatters light and reads as “cloudy.”

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Macro of a cloudy, foggy aligner surface
Why Brushing Fails
02

Brushing clouds it for good.

Toothpaste is abrasive — every scrub leaves micro-scratches that trap more film and fog the tray permanently.

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Toothbrush scrubbing a clear aligner
Why Tablets Fall Short
03

Tablets ask too much.

A long soak, a chemical aftertaste on a tray you put back in your mouth, and a rinse-and-hope on the grooves. Most people quit by week three.

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A cleaning tablet fizzing in a glass
What Actually Works
04

Ultrasonic reaches the grooves.

Microscopic bubbles collapse against every surface and lift biofilm out — no scrubbing, no new scratches.

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An aligner in the Aurelle, mid-cycle with UV glow
The Ritual
05

Just water. Five minutes. Done.

Tray in, tap water in, press the button. No tablets, no chemical taste, nothing to re-order.

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Hand dropping an aligner into the Aurelle on a counter
Keep your aligners invisible
What to expect — honestly

It deep-cleans the daily film a brush leaves behind. It won’t un-scratch a tray brushing already etched, or reverse warping — it cleans the tray you have, not a new one.

Aurelle Ultrasonic Cleaner
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Aurelle Ultrasonic Cleaner
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60 nights, risk-free. Clearer than your old routine, or your money back. See full details →
The science behind this
[1] Harzivartyan et al. “Evaluation of Microbial Colonisation on Clear Aligners With Different Cleaning Methods.” Orthodontics & Craniofacial Research (2025). View study →
[2] Abrasive cleaning increases clear-aligner surface roughness. Scientific Reports (2025). View study →
[3] Seneviratne et al. “Ultrasonic Cleaning of Dental Instruments.” International Dental Journal (2025). View study →
[4] Ultrasonic cleaning as a recognized method for clear aligners. BMC Oral Health (2026). View study →
These explain the science of biofilm, surface wear, cavitation, and ultrasonic cleaning. They describe how the process works — they are not studies of this product.