Section III.  OPERATOR’S MAINTENANCE PROCEDURES 3-3.  Cleaning.   Table 3-2 lists the cleaning tasks for each AIHS assembly. COMPONENT CONDITION CLEANING METHOD Helmet shell Dirt, grease, scuff marks Use mild detergent and clean cloth. Earcups Dirt, perspiration Wipe with damp cloth; for earphone protection, do not use too much water. Communications cord assembly Dirt, grease Wipe with damp cloth; dry thoroughly. CEP-equipped helmets only: CEP and extension cable Dirt Remove foam tips from earplugs.  Hand-wash the foam tips with warm water and mild soap, and allow them to air-dry. Do not wash the foam tips any more than necessary (about once a week); the more often they are washed, the sooner they will wear out.  Replace foam tips when they are too soiled to clean.  Wipe CEP and extension cord with damp cloth. Visors Dust, grease, perspiration Use soft cloth and mild soap solution; rinse thoroughly. Visor housing, track, knob Sediment, dirt buildup, grease Use clean cloth dampened with mild soap solution. Retention assembly Dirt, grease Use clean cloth dampened with water; allow to dry thoroughly. Cloth cover, thermoplastic liner Dirt, stains Machine wash (gentle cycle) or hand wash with warm water; allow to air dry.  (Do not use dryer.) Plastic layers, thermoplastic liner Dirt Wipe exterior layers with damp cloth.  Replace two-sided tape (received from ALSE technician) after cleaning. Helmet bag Surface dirt Use regular detergent. Machine wash (gentle cycle) or hand wash with warm water; allow to air dry.  (Do not use dryer. Change 3 3-3 TM  1-8415-216-12&P