Always keep the blade locking areas clean. Accumulation of dirt/debris may adversely affect the locking function. To properly clean, use clean, hot, soapy tap water; rinse thoroughly with hot tap water; flush/dry completely with compressed air. For best results we recommendusing BlueLubeM Cleanser for all cleaning, lubricating, and protection of your LIOME. For optimum blade mechanics, periodically apply Lubricant to the pivot screw.