How in the world do you clean verticle blinds? They are behind the tables in my early childhood room---might I say not a good plan----. We have to clean our own spaces, so please, no "call the coustodian" answers. In a perfect world I would love to not have to take them off the wall, since I am not sure they would go back up. They are more than 7 years old at this point. Please help me, I can't handle the grime anymore!