How should I clean and maintain the BCD704C1?

Blow dirt and dust from all ventilation ducts with dry air at least once per week, always wearing ANSI Z87.1-approved eye protection. Never use solvents or abrasive chemicals on non-metal parts; instead, use a cloth dampened only with water and mild soap. Do not allow any liquid to enter the tool or submerge any part in liquid. (Page 11)