Those of you who have undergone orthodontic treatment will realize just how important retainer cleaning is for oral care. If your retainer isn't clean, you might notice an unpleasant odor while wearing it. I use Denforming Plus for maintaining a clean retainer and oral hygiene, and I highly recommend it because it makes cleaning so simple. It comes out as a foam, making it easy to use, and the scent is refreshing—a fragrance that everyone will likely enjoy. The price is also reasonable at 8,900 won for the smallest 50ml size shown in the photo, making it a good price to buy one to test out. If you are satisfied after using it, I recommend purchasing the larger size!