Yes the key is correct. My sister reads Japanese and bought this one for me in Japan.
Same for me, there is no dirt on the cotton pad. But I guess maybe I ususally use it right after I removed my make up, so there is no more dirt to be removed.
By the way, I use my normal toner for the cleaning part, and use the gel (inside the box) for moisturizing and lift up.
May I ask what product you are using for moisturizing and lift up? Is it good?