There's a special brush out there for just about anything you'd ever want to give the brushoff — everything from dirt to mildew, barbecue grime to countertop crumbs. They can be used dry (to remove surface dirt from irregularly shaped objects) or wet (to work in conjunction with cleaners). Make sure the brush you're using won't damage the object you're attempting to clean. Brush bristles can be made of soft hair, synthetics, natural fibres or metal (most commonly stainless steel or brass).