The best way to clean Spark aligners is simple: wash them with clear, unscented soap and lukewarm water, then gently brush them with a soft-bristle toothbrush. Doing this at least twice a day, every time you remove them for a meal, keeps them clear and free of bacteria buildup. Beyond that basic routine, a few habits will help you avoid the yellowing and odor that catch most aligner wearers off guard.
Daily Cleaning Step by Step
Every time you take your Spark aligners out to eat or drink, rinse them under lukewarm running water before setting them down. This washes away saliva and loose bacteria before they have a chance to dry on the surface. When you’re ready to put them back in, give them a proper clean:
- Apply a small drop of clear, unscented liquid soap to your fingertips or directly onto the aligner.
- Brush gently with a soft-bristle toothbrush dedicated to your aligners (not the same one you use on your teeth). Work the bristles over every surface, inside and out, for about 30 seconds per tray.
- Rinse thoroughly under lukewarm water until all soap residue is gone. Soap film left behind can taste unpleasant and may irritate your gums.
Do this routine at minimum in the morning and before bed. If you can manage it after lunch too, even better. The goal is to never let a film of dried saliva sit on the plastic for hours, because that’s what turns aligners cloudy and gives them a smell.
What Not to Use
Toothpaste is the most common mistake. It feels logical, but most toothpastes contain fine abrasive particles designed to scrub enamel. Those same particles scratch the surface of aligner plastic, creating tiny grooves that trap bacteria and make the trays look hazy. Spark’s manufacturer specifically warns against it.
Boiling water will warp the plastic and ruin the fit of your aligners permanently. Even very hot tap water can soften the material enough to change its shape, so stick with lukewarm or cool water only. Avoid soaking your aligners in any heavy cleaning solution overnight. Short soaks of 15 to 20 minutes in a gentle cleaning tablet solution are generally fine, but leaving trays submerged for hours can degrade the material or affect clarity. Colored mouthwash is another one to skip, as the dyes can tint the plastic.
Dealing With Stains and Buildup
If your aligners have already started to yellow or develop a white, chalky residue, a short soak can help. Effervescent retainer-cleaning tablets (sold under various brand names at most pharmacies) work well. Drop one into a cup of lukewarm water, place your aligners in, and let them fizz for 15 to 20 minutes. Then brush gently with your soft toothbrush, rinse, and put them back in.
For stubborn spots, you can try a solution of equal parts lukewarm water and white vinegar for a 15-minute soak. The mild acidity helps dissolve mineral deposits. Follow up with a soap-and-water brush to remove the vinegar taste. If staining has become severe and you’re close to switching to your next tray, it may not be worth the effort. Most Spark patients change trays every one to two weeks, so a slightly discolored set will be replaced soon.
Foods and Drinks That Cause Staining
The biggest offenders are coffee, tea, red wine, tomato sauce, curry, berries, and dark-colored juices. If you drink or eat any of these with your aligners in, staining is almost guaranteed. The rule is straightforward: remove your aligners before eating or drinking anything other than plain water.
What catches people off guard is what happens after the meal. Putting aligners back over teeth that still have coffee residue or curry particles on them traps those pigments directly against the plastic for hours. Brush your teeth, or at minimum rinse your mouth thoroughly with water, before reinserting your trays. This single habit makes a bigger difference to aligner clarity than any cleaning product.
Keeping Aligners Clean Away From Home
Cleaning aligners at a restaurant or at work doesn’t require a full kit. A small travel toothbrush and a travel-size bottle of clear liquid soap fit easily in a pocket or bag and cover everything you need. If you don’t have soap available, a thorough rinse under running water and a brush with just the toothbrush is far better than putting dry, saliva-coated trays back in your mouth.
Always carry your aligner case. Wrapping trays in a napkin is the number one way people accidentally throw them away. When your aligners are out of your mouth, they should be in the case or being cleaned. Keep the case itself clean too by rinsing it with soap and water daily and letting it air-dry with the lid open. A damp, closed case becomes a breeding ground for bacteria surprisingly fast.
Morning and Nighttime Routines
Your aligners collect bacteria while you sleep, so the morning clean is arguably the most important one. When you wake up, remove your trays, brush them with soap and water, and brush your own teeth before putting the aligners back in. Skipping this step means you’re sealing overnight bacterial growth against your teeth for the rest of the morning.
At night, the process mirrors: brush and floss your teeth thoroughly, then clean your aligners before wearing them to bed. Going to sleep with food debris under your trays dramatically increases your risk of cavities during treatment, since the aligners prevent saliva from doing its normal job of washing your teeth clean. A consistent two-minute routine at each end of the day keeps both your teeth and your trays in good shape throughout treatment.