Hyde Tools 46812 Stainless Steel Grout Brush

stay in the joint, track the wire down the line, let it work the raked profile — but with stainless the "stay in the joint" rule is a glaze-protection rule, not just an efficiency one. Use light-to-moderate pressure; leaning doesn't help stainless cut grout much and only raises the risk of the wire skating onto a tile face. Let a cleaner soften mineral deposits and re-apply rather than grinding dry. Because it's the hardest brush in the trio, it's the one most likely to leave a mark if abused — so it's the escalation tool: reach for it when brass has failed, test first, and back off the moment the joint is clean. Unlike a carbon brush, it won't rust in the wet work, so it needs no drying ritual for corrosion — though rinsing debris out keeps it cutting.