I've got a Bosch washing machine. Inside the hole left when you take the drawer out to wash it it's really grimy and gross, and often maybe one or two items per load get grey gunk on them, it looks like a line of maybe dried washing powder or something, maybe from the rubber seal?? I've tried using detergent you put in the drum as opposed to the drawer but it doesn't seem to affect the grime inside the drawer hole (I always put fabric conditioner in there). How can I stop it getting so gross? I always leave the drawer open to dry too...