All leather products can’t be washed in any case. If one part is dirty (Make Up, Glitter etc.), you can apply little bit body cream without perfume, preservatives and alcohol on top of the leather and gently wipe with a dry cloth or cotton pads to draw without the leather.
The Leather Belts should hang on a hanger. If a part (a part from soft leather) is wrinkled, you can even iron from the inside with a dry cloth slight to medium heat (with pressure without pulling the leather).
If the purchased item has a too long belt, you can cut the other belt, depending on the personal size.
Whit leather scurf failure a lighter can help, gently and quickly heat up short at the edge of the leather from the inner side.
Dessous “Sex Syndrome” should be washed by hand in warm water.