Bicycle Helmet Cleaning: Pads, Shell and Safe Drying
Giro's guidance separates removable pad cleaning from wiping the helmet shell, with warnings about solvents, heat, immersion and damage.
A helmet is protective equipment, so check for crash damage before cleaning. Do not soak the entire helmet; distinguish removable pads from the shell and follow the exact model manual. A helmet involved in a significant impact may need replacement even if damage is hidden.