The printer contains melted wax when at operating temperature, and owners' manuals warn that it cannot be moved until it has completed a special cool-down cycle selected from the machine's control panel. It is recommended to provide a 30-minute cool down time from the point of removing main power, however all modern solid-ink printers have a shutdown cycle which use fans to solidify the ink in less than ten minutes, with the added benefit of physically restraining the printhead to prevent damage during moving or shipping. The manuals warn that substantial damage is possible otherwise, requiring servicing by a trained technician if not properly cooled down before moving the printer. Moving the printer before cool down completes can damage the print head by spilling molten ink between reservoirs of different color as well as over other components inside the printer (motors, belts, etc.), and is not covered under maintenance or warranty. Because of the liquid-ink-spillage concern, solid-ink printers are not suitable for mobile usage, such as on movable carts for printing pricing tags in retail settings.