How to Clean Aligners at Home: Care, Products, and Mistakes

Aligners are worn 20–22 hours a day, so caring for them is as much a part of treatment as the wearing schedule. Proper cleaning keeps the trays clear, protects the teeth and gums from inflammation, and prevents bad odour. Here is how to care for aligners at home and which mistakes to avoid.

Why aligners need daily cleaning

Bacterial plaque and food debris settle on the surface of the trays. Without daily care, the material quickly turns cloudy, and the trays become a breeding ground for bacteria, which can lead to decay and gum inflammation. Plaque build-up causes a persistent odour, and yellowed trays cancel out the main advantage of aligners, their invisibility.

How often to clean

At minimum, morning and evening, but ideally you should rinse the trays every time you take them out. It is especially important to clean the system thoroughly before bed. If you have had coffee, tea, juice, or soda without the trays in, brush your teeth and rinse the aligners under running water before putting them back.

Step-by-step instructions

1. Remove the aligners with clean hands.
2. Rinse the trays on all sides with cool or lukewarm water.
3. Apply a non-abrasive toothpaste or fragrance-free baby soap to a soft brush.
4. Go over the outer and inner surfaces with gentle circular motions, without pressing hard.
5. Rinse off all residue thoroughly under running water.
6. Brush your teeth and use floss or interdental brushes.
7. Put the trays back on according to the schedule your doctor gave you.

What you can and cannot clean with

Toothpaste

Only clear gels without abrasive particles and with a low RDA value (0–30) are suitable, usually toothpastes for children and for sensitive teeth. Whitening and abrasive pastes leave micro-scratches on the plastic where plaque then accumulates.

Brush

Use a separate soft brush, for example a children's one. Medium or hard bristles, as well as electric toothbrushes, are not recommended because they scratch the surface.

Cleaning tablets

The tablets dissolve in water and create a disinfecting solution that removes stubborn plaque and odour. The trays are usually soaked for 10–15 minutes and then rinsed under running water. Tablets complement mechanical cleaning but do not replace it.

What is prohibited

• boiling water: the plastic deforms and the tray stops fitting;
• baking soda, citric acid, alcohol, chlorine-based products, household chemicals;
• hydrogen peroxide: over time it makes the material rough;
• sharp objects for removing food particles;
• menthol toothpastes: they contain hard micro-particles that scratch the plastic.

Storage and care when travelling

Store the trays only in a clean, dry case. Do not wrap them in a napkin or put them in a pocket or bag without the case; they are easily deformed or thrown away that way. Keep the case away from heat sources and wash it regularly.

When travelling or at work, carry a travel kit: a container, a soft brush, and a small toothpaste. After eating out, brush your teeth and rinse the trays before putting them back on.

If an aligner has yellowed or smells

Yellowing is usually caused by contact with coffee, tea, juices, sauces, and berries. Trays cannot be whitened at home, and aggressive products will only damage the material. Use cleaning tablets; if that does not help, wear the set for the prescribed time while following the care rules more strictly.

Odour is the first sign of active bacterial growth. It most often occurs when trays are put on without brushing. Brush before every insertion, rinse and dry the case, and use tablets. If the odour persists, see your doctor.

When to see an orthodontist

• the trays no longer fit snugly or have deformed;
• a crack or chip has appeared;
• plaque cannot be removed with special products;
• the trays have become cloudy or rough to the touch;
• gum irritation, pain, or inflammation of the mucosa has appeared.

Professional hygiene at the dentist every 3–4 months is also mandatory during treatment: home cleaning does not remove dense plaque and tartar. At follow-up visits, an iOrtho orthodontist will tell you whether your hygiene and trays are in good order.