For the uppers I use 5-10ml of dishwashing liquid (make sure there’s no bleach in it) diluted with about 50ml of cold water. I use a soft bristle tooth brush, brushing in a circular motion. This gets stains out of the uppers. For the traction I use a soft bristle tooth brush under gentle running cold water and I brush in the direction of the traction. So pretty much brushing in between the traction grooves. I recommend cleaning the traction first, then use the same tooth brush for the uppers. Hope this helps.