How To Clean Plastic Retainers With Vinegar. By soaking your retainers in a vinegar and water solution, you can eliminate odours and bacteria from your device. Combine equal parts of water and vinegar in a bowl or dish.
Make sure the water isn’t too hot, though! Bath it in a mixture of white vinegar and warm water (1:1). Add equal parts white vinegar and slightly warm water (not boiling hot, as that will warp or break your retainer).
How to clean retainers with vinegar.
To clean a removable retainer, follow these steps: Make sure the water isn’t too hot, though! The retainer is soaked in the vinegar for at least an hour, brushed gently with a soft toothbrush, and then rinsed very well. Have a clean glass container and fill it halfway with warm water.