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Keeping your clear aligners clean is one of the most important daily habits during orthodontic treatment. Whether you are new to invisible braces or well into your aligner journey, proper cleaning helps protect your oral health, keeps your trays hygienic, and supports the overall success of your treatment.
Clear aligners sit directly against your teeth for most of the day — typically 20 to 22 hours. This close contact means that bacteria, saliva, and food particles can accumulate on the trays if they are not cleaned regularly. Without proper care, aligners can develop an unpleasant odour, become discoloured, or harbour bacteria that may contribute to dental issues such as plaque build-up or gum irritation.
In this article, we will explain how to clean clear aligners correctly, what products and techniques to avoid, and how maintaining good aligner hygiene fits into your broader oral care routine. If you are currently undergoing orthodontic treatment or considering it, this guide may help you feel more prepared and confident about day-to-day care.
Clear aligners should be rinsed every time they are removed and cleaned thoroughly at least twice daily using a soft-bristled toothbrush and lukewarm water. Avoid hot water, coloured or abrasive toothpastes, and harsh chemicals, as these can warp, scratch, or discolour the aligner material. Gentle, consistent cleaning is the most effective approach to keeping aligners fresh and hygienic throughout your treatment.
Clear aligners create a close-fitting barrier over your teeth. While this is essential for guiding teeth into new positions, it also creates an enclosed environment where moisture and warmth can encourage bacterial growth.
If aligners are not cleaned regularly, several issues may develop:
Good aligner hygiene is not just about aesthetics. It is an important part of maintaining your overall dental hygiene during treatment and supporting the health of your teeth and gums.
Establishing a simple, consistent cleaning routine is the best way to keep your aligners in good condition. Here is a recommended daily approach:
This daily routine takes only a few minutes but can make a significant difference to the freshness and longevity of your trays.
Knowing what not to do is just as important as knowing the correct cleaning method. Several common mistakes can damage aligners or reduce their effectiveness:
When in doubt, lukewarm water and a soft brush remain the safest and most effective cleaning combination.
In addition to your daily routine, occasional deeper cleaning can help keep aligners fresh — particularly if you notice any build-up or slight discolouration.
Several manufacturers offer cleaning solutions specifically designed for clear aligners. These are typically dissolved in lukewarm water, and the aligners are soaked for a specified period (usually 15 to 30 minutes). These products are formulated to be safe for aligner materials and can help remove bacteria and light staining.
A gentle baking soda solution (one tablespoon of baking soda dissolved in a cup of lukewarm water) can be used for a brief soak. Baking soda is mildly alkaline, which may help neutralise odour-causing bacteria. However, do not scrub aligners with dry baking soda, as the granules can be abrasive.
A solution of equal parts white vinegar and lukewarm water can be used for a short soak (15 to 20 minutes) to help break down mineral deposits. Rinse the aligners thoroughly afterwards, as vinegar has a strong taste. This method should be used sparingly, as prolonged or frequent vinegar exposure may affect the aligner surface over time.
A diluted hydrogen peroxide solution (equal parts 3% hydrogen peroxide and lukewarm water) may be used for a brief soak to help with disinfection. This should be rinsed thoroughly afterwards. As with all soaking methods, follow your clinician’s advice regarding suitability for your specific aligner type.
Cleaning your aligners is not just about maintaining the trays themselves — it is an integral part of your overall oral hygiene routine during treatment.
When aligners are worn over teeth that have not been properly brushed, food particles and bacteria become trapped against the tooth surface. This can accelerate plaque formation and increase the risk of:
By cleaning both your teeth and your aligners thoroughly before each reinsertion, you help create a cleaner environment within the mouth and reduce the likelihood of these issues developing.
Ultrasonic cleaners are small devices that use high-frequency sound waves to agitate a cleaning solution, dislodging particles from surfaces. Some patients find these useful for cleaning aligners, and they can be effective at removing build-up from hard-to-reach areas. However, not all aligner manufacturers recommend ultrasonic cleaning, so it is worth checking with your dental team before using one.
When travelling, carry a small soft-bristled toothbrush and a travel-sized bottle of clear, unscented soap. Rinse your aligners under running water whenever you remove them, and clean them as thoroughly as possible using the brush and soap. If access to running water is limited, pre-moistened aligner wipes (available from some orthodontic suppliers) can be a convenient alternative.
Minor cloudiness is common with extended wear and may be caused by mineral deposits from saliva or micro-scratches from brushing. A gentle soak in an aligner cleaning solution may help reduce mild cloudiness. However, once scratches are present, they cannot be fully reversed. Preventing cloudiness through gentle cleaning and avoiding abrasive products is more effective than trying to restore clarity after the fact.
Aligners should be removed before eating any food. Chewing with aligners in can damage or crack the trays. Drinking plain water with aligners in is fine, but coloured, sugary, or acidic drinks (including tea, coffee, juice, and fizzy drinks) should be consumed with aligners removed to prevent staining and enamel damage.
Aligner storage cases should be cleaned regularly — ideally daily — and replaced every few weeks or whenever they show signs of wear, discolouration, or damage. A dirty case can reintroduce bacteria to freshly cleaned aligners, undermining your hygiene efforts.
Cleaning clear aligners properly is a simple but essential part of orthodontic treatment. By establishing a gentle daily routine, avoiding products that can damage the aligner material, and maintaining good oral hygiene alongside your aligner care, you can help ensure that your treatment progresses smoothly and comfortably.
If you have any concerns about aligner hygiene or notice changes in the condition of your trays, your dental team is always the best source of advice. Regular check-ups during treatment provide an opportunity to address any questions and ensure that both your aligners and your teeth are in excellent condition.
Dental symptoms and treatment options should always be assessed individually during a clinical examination.