The best way to clean Invisalign aligners is with a soft-bristled toothbrush and a small drop of clear, unscented liquid soap, followed by a thorough rinse under lukewarm water. This should happen every night, ideally when you brush your teeth. Beyond that nightly routine, you should rinse your aligners under lukewarm water every time you remove them during the day to prevent saliva and bacteria from drying onto the plastic.
The Nightly Cleaning Routine
Your core cleaning method is simple and doesn’t require any special products. Use a soft-bristled toothbrush (separate from the one you use on your teeth) and a drop of clear, fragrance-free liquid soap. Gently brush all surfaces of the aligner, rinse thoroughly, and you’re done. This removes the film of bacteria, saliva proteins, and food particles that accumulate throughout the day.
The soap you choose matters more than you might expect. Stick with clear, unscented dish soap or antibacterial hand soap that’s free of dyes. Colored or scented soaps can leave residue on the plastic and introduce chemicals you don’t want sitting against your teeth. If the soap has a color, skip it.
Quick Rinses Throughout the Day
Every time you take your aligners out to eat or drink, rinse them under lukewarm water before setting them down. This takes about ten seconds and prevents debris from hardening on the surface. When you put them back in, rinse again. These quick rinses are the single easiest thing you can do to keep your trays clear and odor-free between deeper cleanings.
Soaking Options That Work
If brushing alone isn’t keeping your aligners fresh, a short soak can help. You have several safe options.
Invisalign cleaning crystals: The manufacturer’s own product contains sodium sulfate and other cleansing agents. You dissolve the crystals in water, soak the aligners for 15 to 20 minutes, then brush and rinse. Using these once a day is a solid supplement to your nightly brushing routine.
White vinegar solution: Mix one part white vinegar with three parts water and soak the aligners for about 15 minutes. This helps dissolve mineral buildup and kill bacteria. The smell dissipates quickly after rinsing, but if it bothers you, follow up with a gentle soap brushing.
Hydrogen peroxide solution: Mix equal parts standard 3% hydrogen peroxide and water. Soak aligners for about 20 minutes, then rinse well. This acts as a mild disinfectant without damaging the plastic. Don’t use hydrogen peroxide undiluted, as it’s too strong at full concentration.
Ultrasonic Cleaners
Ultrasonic cleaning devices use high-frequency sound waves to create tiny bubbles that reach into the small crevices of your aligners, areas a toothbrush can miss. They’re effective at removing biofilm and are popular among people who want a more thorough clean without extra scrubbing. You fill the device with water (sometimes adding a cleaning tablet), place the aligner inside, and run a short cycle. They’re not essential, but if you notice persistent cloudiness or odor despite regular brushing, an ultrasonic cleaner is a worthwhile upgrade. Follow up with a gentle brush afterward to remove any loosened particles.
Why Cleaning Matters for Your Gums
Dirty aligners aren’t just an aesthetic problem. Research from the ADA Forsyth Institute found that clear aligner patients with progressing gum inflammation had elevated levels of three bacterial species that appear to work together to drive inflammation. These bacteria form a chain: one attaches to the surface of another, and the pair then interacts with a third species known to contribute to gum disease. Aligners trap bacteria against your teeth and gums in a warm, moist environment, which is exactly the condition these organisms thrive in. Consistent cleaning breaks that cycle.
What to Avoid
Several common cleaning methods will damage your aligners or make them less effective.
- Hot water: The thermoplastic material in Invisalign aligners begins to soften and deform at around 80°C (176°F). You won’t hit that temperature with tap water, but boiling water, dishwashers, or very hot rinses can warp the trays enough to change their fit. Always use lukewarm or cool water.
- Toothpaste: Most toothpastes contain mild abrasives designed to polish enamel. On soft plastic, those same abrasives create microscopic scratches that make aligners cloudy and give bacteria more surface area to cling to.
- Colored mouthwash: Mouthwashes with artificial colorants, particularly those containing chlorhexidine or cetylpyridinium chloride, can stain both your teeth and your aligners. Chlorhexidine stains teeth in most people with prolonged use, and that discoloration transfers readily to clear plastic. If you want to use mouthwash, do it after removing your aligners and rinse your mouth before putting them back in.
- Denture cleaners: Some denture tablets are too harsh for the thinner plastic of orthodontic aligners and can cause discoloration or surface degradation over time.
A Simple Daily Schedule
Keeping your aligners clean doesn’t need to be complicated. In the morning, rinse them under lukewarm water before putting them back in. Each time you remove them to eat, rinse again. At night, brush them with a soft toothbrush and clear liquid soap, and once a day, give them a 15 to 20 minute soak in cleaning crystals, a vinegar solution, or diluted hydrogen peroxide. That combination covers both the surface debris and the bacterial buildup that accumulates over a full day of wear. Since you switch to a new set of trays every one to two weeks, this routine is more than enough to keep each set clear and hygienic for its lifespan.