Which cleaning method is appropriate for a hard hat?

Using mild soap and warm water is the appropriate cleaning method for a hard hat because it effectively removes dirt and contaminants without damaging the helmet's protective features. Hard hats are designed to absorb impact and protect against various hazards, and using harsh chemicals or high-pressure steam can compromise their structural integrity and performance. Mild soap is effective in cleaning while being gentle enough not to degrade the materials used in the hard hat. This approach ensures that the helmet remains safe for use and fulfills its protective role, which is crucial in ensuring worker safety in hazardous environments.