My horse likes to roll and he gets EXTREMELY dirty. He gets especially dusty. I cannot tolerate the dust flying around during grooming due to asthma and allergies. At the moment, it is too cold to bathe him. My brushes are cleaned very frequently and so are the horses. Even after several HOUR of grooming, my horse is still dirty. I have even groomed him until he got sore and he was still full of dust. My saddle pads are getting VERY dirty and as you can well imagine, it is a painstaking progress of grooming him if I want to ride. Is there anything I can do to to clean him/keep him clean without bathing or simple brushing? How clean does a horse have to be before you can saddle him up?