I used a fiberscope to take pictures of the back side (outside) of the washing tub, which is normally invisible, in a vertical washing machine that had been using CLIMA for 3 months.
After washing, it returns to water, so it's clean and free of dirt!
1st photo: The left side is the lower side of the washing tank, the right side is the water tank (white plastic part)
2nd photo: Near the middle of the washing tub
3rd photo: bottom side of washing tub
4th and 5th photos: The place where the hole in the washing tub is shining is where the photo was taken.