Since Speedy was particularly crusty on Saturday morning, I dug into his coat with the jelly scrubber. I can scrub pretty vigorously along his neck, shoulders, belly, and hind quarters, but I have to use a much lighter touch across his back. Here's what the jelly scrubber lifted out of his hind end.
I found that shorter strokes helped lift the dirt from his skin, and then a gentle flick sent it off his coat without settling back down. After grooming his whole body, his coat felt clean and soft, almost as a good as after a shampoo.
This brush is of a medium stiffness, but it worked great on both of my horses' fine summer coats. I don't know how it will do on heavy winter coats, but now that I've tried one of the Haas brushes, I will definitely be adding more. And fortunately for me, there is a huge selection from which to choose.
Which ones are you using?