Before cleaning a stacker, what precaution is typically advised on the safety sticker?

The correct precaution to be aware of before cleaning a stacker is to prepare moisture-proof measures. This is important because stackers often have electrical components and systems that can be damaged by water or cleaning agents. Ensuring that moisture does not enter these areas helps to prevent electrical shorts or malfunctions, ensuring both safety and the longevity of the equipment.

While ensuring the surface is dry, using an approved cleaner, and disconnecting the power source are all valid safety considerations related to cleaning machinery, the specific emphasis on moisture-proof measures directly addresses the risks associated with water exposure to electrical components. This highlights the need to protect sensitive parts from moisture, which can be a primary concern in maintaining the operational integrity and safety of the stacker.