Ugh. Dust. You bring it up with a curry and then it just sits there on the hair, laughing at you. Bath is the best, but when that's not reasonable (too cold, too busy, too soon since the last bath)...I have this stuff from the tack shop - it's a pink-ish concentrate "Hair Moisturizer". I keep a spray bottle of the diluted stuff in my grooming tub, and spritz that on the soft brush I use after currying & flick-brushing. It will certainly transfer the dust from the horse to your brush... The brush gets nasty, but it's a lot easier to wash the brush than it is to wash the horse. My favorite side-benefit of this is that in the winter when it's cold and dry, this not only takes the dust off, but it really cuts down on the amount of static that builds up between the horse's hair and the blankets.