Clear aligners sit against your teeth for up to 22 hours a day. Unlike fixed braces, they can be removed for eating, drinking, and cleaning. That flexibility is one of their advantages, but it also means keeping them clean is something you need to actively manage. Bacteria and food residue can build up on the tray surface quickly, and if left, this can affect both the aligners and the teeth they sit against.
If you wear clear aligners or Invisalign trays, the cleaning routine does not need to be complicated or time-consuming. Most of it fits into what you are already doing when you brush your teeth. This guide covers the basic daily method, what products and habits to avoid, and when a more thorough clean is worth doing.
Quick Overview
- Aligner cleaning is a daily routine, not an occasional task.
- It may involve a soft toothbrush, clear liquid soap, and lukewarm water as a starting point.
- Skipping regular cleaning can allow bacteria and staining to build up on the trays.
- What works best varies depending on your schedule, sensitivity, and how quickly your trays discolour.
- Your dentist can advise on cleaning products and routines suited to your specific treatment.
Keep reading to understand the basic method, what to avoid, and when to clean more thoroughly.
The Basic Method for Cleaning Clear Aligners
The simplest and most reliable approach is to clean your aligners every time you brush your teeth, morning and night.
Rinse the trays under lukewarm water first to remove loose debris. Then use a soft-bristled toothbrush and a small amount of clear, uncoloured liquid soap to gently brush all surfaces of the aligner, inside and out. Rinse thoroughly with warm water before placing them back in your mouth.
Bacteria and debris trapped against the teeth from unwashed trays can cause decay or discolouration of the teeth. Keeping the trays clean is part of keeping your teeth clean during treatment.
A few things to avoid during this process:
- Hot water: Heat can warp the plastic and affect the fit of the tray.
- Toothpaste: Most toothpastes are abrasive enough to scratch the surface of the aligner, making it appear cloudy and giving bacteria more texture to cling to.
- Coloured soaps or strong detergents: These can stain or damage the tray material.
When to Clean More Thoroughly
The basic nightly clean is sufficient for most days. If your aligners look visibly cloudy or have built-up residue, a more thorough clean may help.
Clear aligner cleaning crystals or effervescent tablets, dissolved in lukewarm water, can loosen built-up bacteria from the tray without damaging it. Soak the aligners for the time recommended on the product packaging, then rinse and brush gently before wearing again.
Diluted white vinegar in water is sometimes used as an accessible alternative for a deeper soak. It is generally considered less effective than purpose-made cleaning products but can be useful between restocking.
Avoid rubbing alcohol and denture cleaners not specifically indicated for clear plastic aligners, as these can degrade the material over time.
A soft toothbrush with clear liquid soap, rinsed with warm water after, is the recommended daily method for keeping aligner trays clean. Purpose-made cleaning products can support this routine where needed.
Everyday Habits That Help
A few consistent habits reduce how quickly your trays pick up bacteria and staining:
- Remove aligners before eating or drinking anything other than water.
- Rinse your aligners each time you take them out, even if a full clean is not practical.
- Brush your teeth before reinserting your trays to avoid trapping food particles against the enamel.
- Store aligners in their case when not wearing them. Leaving them uncovered exposes them to airborne bacteria.
These steps take less than a minute each and make a noticeable difference in how clean the trays stay between thorough cleans.
Keeping Your Trays Clean Throughout Treatment
Keeping clear aligners clean is straightforward when it becomes part of your daily routine. The basic method takes no longer than brushing your teeth and significantly reduces the risk of staining or bacterial buildup on the trays.
If you have questions about how to care for your aligners during treatment, or would like to discuss your progress, Dr Jack Yang is available at both clinic locations.
Call Castle Hill: (02) 8806 3712
Call Winston Hills: (02) 9000 1778
Or book an appointment online.
Frequently Asked Questions
Can I use toothpaste to clean my aligners?
Toothpaste is not recommended for cleaning clear aligners. Most toothpastes contain mild abrasives designed to polish tooth enamel, but these can scratch the surface of the aligner tray. Scratches make the tray appear cloudy and create small grooves where bacteria can accumulate. A clear liquid soap and soft toothbrush are a more suitable alternative.
How often should I clean my aligners?
Aligners should be rinsed every time you remove them and cleaned thoroughly at least twice a day, in line with your regular brushing routine. If you notice cloudiness or residue building up, a purpose-made aligner cleaning soak can be used periodically in addition to daily brushing. Your dentist can advise how often deeper cleaning is appropriate for your trays.
References
Healthdirect Australia. (2025). ‘Dental braces and retainers’. Healthdirect Australia, 07 October. https://www.healthdirect.gov.au/dental-braces-and-retainers
Teeth.org.au. (n.d.). ‘Teeth Straightening and Braces’. Teeth.org.au. https://www.teeth.org.au/teeth-straightening-and-braces
