Hyde Tools 46840 6-3/4" High-Carbon Steel Wire Scrub Brush

you want the fill bearing into the surface, not dragging across it — a moderate pole angle lets your weight load the tips on floors, and controlled push-pull loads them on walls. Let the deep face cut: moderate, sustained pressure; the depth of the block is there so the tips keep working as they wear, not so you can lean harder. Mind the leverage: a long pole multiplies your force, so it's easy to fold the wire over and set it — if the brush is skating instead of cutting, the crust needs a scraper first, not more pole pressure. Carbon care still applies: dry the block after wet work and store it dry, or the carbon fill blooms rust and sheds; never oil it before a paint job.