The dry rescue, in order
Start with the brush over the whole shoe to lift the nap and shake out surface grit. Then go in on specific marks with a suede eraser — the crepe rubber block sold alongside the brushes, though a clean pencil eraser does a surprisingly decent job in an emergency. Rub gently back and forth over scuffs and shiny patches, then brush away the crumbs. Shiny areas on the toe or heel are flattened fibres, and the eraser plus brush combination is genuinely the fix.
For mud, wait. Let it dry completely into a crust, then crack it off with your fingers and brush the rest away. Wiping wet mud grinds it in and leaves you with a shadow you will be fighting for weeks. For grease — a splash of oil, a dropped chip — cover the spot generously with cornflour or talc and leave it overnight so the powder draws the oil out. Brush it off in the morning and repeat if the mark has only faded rather than gone.
When water is allowed, and how to use it
There is one situation where moisture helps: when the whole shoe has an uneven tidemark and the only way to even it out is to dampen the entire panel. Use a cloth barely dampened with cool water, wipe evenly across the full section rather than spot-dabbing, let it dry naturally away from heat, then brush the nap back up. The goal is uniformity, not saturation.
