Short answer: To clean clear aligners, rinse them in lukewarm water every time you take them out, and brush them gently morning and evening with a soft brush and clear, unscented liquid soap. Hot water, toothpaste, bleach and colored mouthwashes can scratch the aligners or warp their shape. Brush your teeth before putting the aligners back in, and always keep them in their case when you are not wearing them.
In clear aligner treatment, the aligners are what move the teeth; but because they stay in the mouth all day, they are in constant contact with saliva, bacteria and food debris. That is why clear aligner cleaning matters as much for oral health as it does for appearance. A well-kept aligner stays invisible and does not add to the risk of tooth decay or gum inflammation. In this guide we walk through why aligners turn yellow, the daily cleaning steps, the products to avoid and good storage habits, in that order. Because our clinic provides clear aligner treatment with the Invisalign system, our recommendations take the material properties of these aligners into account.
Why do aligners turn yellow and smell?
Aligners usually turn yellow or develop an odor for three reasons: bacterial plaque (biofilm) building up on them, contact with colored drinks, and inadequate drying or storage. Over the course of the day, bacteria in the mouth form a thin, sticky layer on the inner surface of the aligner. Over time this layer shows up as cloudiness, whitish spots and an unpleasant smell.
Another source of discoloration is drinking tea, coffee, cola or red wine with the aligners in. These drinks seep between the aligner and the teeth, staining the aligner and trapping sugary, acidic liquid against the tooth surface for a long time. Smoking also causes noticeable yellowing of aligners. Finally, wrapping wet aligners in a napkin or leaving them uncleaned in a closed, damp place gives bacteria a chance to multiply.
Switching to a new set of aligners at regular intervals is an advantage for hygiene; even so, every aligner needs regular care for as long as it is in use. If you notice excessive cloudiness, a crack or a break, it is a good idea to tell your orthodontist without waiting for your next check-up. For these kinds of situations and how they are handled, you can also see our clear aligner problems page.
How do you clean clear aligners? Daily cleaning steps
Clear aligners should be rinsed every time they are taken out and gently brushed at least twice a day, morning and evening. The routine below is enough for most people:
- Rinse as soon as you take them out: Rinse the aligner in lukewarm or cold water the moment you remove it from your mouth. This keeps saliva from drying and sticking to the surface.
- Use a soft brush: Get a soft-bristled brush that you use only for your aligners, separate from your toothbrush. Brush the inner and outer surfaces with light strokes, especially the grooves that sit over the biting edges of the teeth.
- Clear, unscented soap: You can put a small amount of clear, fragrance-free liquid soap on the brush. Colored or scented soaps can leave marks and a taste on the aligner.
- Rinse thoroughly: Rinse with plenty of water so that no soap residue is left.
- Brush your teeth: Brush and floss your teeth before putting the aligners in. An aligner placed over teeth that are not clean presses debris against them and increases the risk of decay.
Aligner cleaning crystals or tablets recommended by your orthodontist can be used a few times a week as extra care; these products do not replace brushing, they complement it. The safest approach is to ask about which product to use at your check-up appointment. For details on putting in and taking out aligners correctly, you can read our article how to use clear aligners.
Weekly deep cleaning
Once a week, you can soak your aligners in a cleaning solution approved by your orthodontist for as long as the manufacturer specifies. Always brush and rinse them afterwards. While you are at it, washing the aligner case with soapy water and leaving it to dry keeps the case from turning into a reservoir of bacteria.
Products you should not use
Stay away from products that can warp the aligner, scratch its surface or change its color. Aligners are made of a thin, delicate thermoplastic, and this material is sensitive to heat and abrasives.
- Hot or boiling water: It can change the shape of the aligner; a warped aligner will not fit the teeth properly and can affect how the treatment plan progresses.
- Toothpaste: Most toothpastes contain abrasive particles. They create fine scratches on the aligner surface where bacteria and stains cling more easily, and the aligner becomes cloudy.
- Bleach and harsh chemicals: These can damage the material and leave residue in the mouth.
- Colored or alcohol-based mouthwashes: Soaking aligners in these liquids can cause discoloration and wear on the material.
- Hard-bristled brushes and the dishwasher: These can cause both scratching and heat-related warping.
Before trying home remedies often suggested online, such as vinegar or baking soda, it is advisable to ask your orthodontist first. Some methods can wear the aligner down more than they clean it.
The aligner case and storage
When your aligners are not in your mouth, they belong in their case. A large share of lost and broken aligners comes from wrapping them in a napkin during a meal and leaving them on the table, or tossing them unprotected into a bag. Pets can also be drawn to the smell of aligners, so they should not be left out in the open.
It is a good habit to rinse the aligners and, if possible, let them air briefly before putting them in the case. Do not leave the case in the sun, in a car glove compartment or next to a radiator; heat can change the shape of the aligner. When traveling, carrying a spare case, a small brush and a bottle of water makes things easier. Also, unless your orthodontist says otherwise, keeping your previous aligner in its case gives you an option while you check with your orthodontist about what to do temporarily if your new aligner is lost or broken.
What should you do after eating and drinking?
Take your aligners out before eating or drinking anything other than water; afterwards, clean your mouth and put the aligners back in. Eating with the aligners in can break them, and sugary or acidic drinks stay in contact with the teeth under the aligner for a long time.
The ideal order after a meal is: brush your teeth, floss, rinse the aligner and put it in. If you are out and cannot brush, you can rinse your mouth well with water, rinse the aligners and put them back in, then finish brushing when you get home. Frequent snacking during the day means taking the aligners out more often and shortens the total wear time. Since aligners are generally recommended to be worn 20–22 hours a day, keeping meals planned helps both hygiene and the progress of treatment.
If you want to drink coffee or tea, taking the aligners out and rinsing your mouth afterwards may be enough. This habit matters even more for drinks you sip slowly over a long time. You can find more practical cleaning tips on our aligner cleaning steps page.
What are the most common aligner care mistakes?
The most common mistake is only rinsing the aligners with water without brushing them. Rinsing removes visible debris, but the bacterial layer stays on the surface unless it is brushed off. The second common mistake is focusing on cleaning the aligner and neglecting the teeth; no matter how clean the aligner is, when it is placed over dirty tooth surfaces it acts like a protective cover and gives bacteria an ideal environment.
Biting the aligners into place, applying force at a single point when removing them, or prying them with your fingernails can also crack them. It is safer to remove aligners evenly from both sides, starting at the back teeth, and to seat them with finger pressure. If your orthodontist has recommended a chewing aid (chewie), remember to keep that clean as well.
When should you have your aligners checked in Ankara?
If, despite regular cleaning, you notice a persistent odor, marked discoloration, a crack or a fit problem with your aligners, or if your gums start to bleed or swell, it is a good idea to see your orthodontist. At our clinic in Park Oran Ofis in Oran, Çankaya, the condition of your aligners and your oral hygiene are assessed together at your check-up appointments; for appointment information, you can use our contact page.
Frequently asked questions
Can I brush my clear aligners with toothpaste?
It is not recommended. Most toothpastes contain abrasive particles that create fine scratches on the aligner surface. These scratches make the aligner cloudy and let bacteria cling more easily. Instead, you can use clear, unscented liquid soap and a soft brush.
Is it OK to disinfect aligners with hot water?
No. Hot or boiling water can affect the thermoplastic structure of the aligner and warp it. An aligner that has changed shape may not fit the teeth properly. Use lukewarm or cold water for rinsing and cleaning.
Can I drink anything other than water with my aligners in?
The general recommendation is to drink only plain water while wearing aligners. Tea, coffee, fruit juice and carbonated drinks can stain the aligner and, by trapping sugary or acidic liquid between the teeth and the aligner, can increase the risk of decay.
How often should I clean the aligner case?
It is recommended to rinse the case every day and wash it with soapy water and let it dry at least once a week. A damp, dirty case can quickly coat the aligner you have just cleaned with bacteria again.
