Don’t submerge them in water or other liquids, just gently wipe every part of the strap and cups with a cloth (plus mild soapy water if they’re mucky). Baby wipes work too. Avoid solvents, harsh chemicals, sharp objects and electric heaters or dryers. Once fully air dried, place Loop Cocoon™ baby earmuffs in their dust bag and store in a cool, dry place away from sunlight.