Tongue cleaner

This is a tongue cleaner I bought as a set of two at Daiso. For a long time, I only brushed my teeth and neglected my tongue. However, upon reflection, I realized that food particles must remain on my tongue as well. Besides, my tongue has many grooves. At first, I used it too hard, so my tongue hurt a lot. You need to clean it gently. With repeated use, the white coating gradually disappeared. Now, there is just the right amount.