Using this Atosa MPRA - 20 pan rack is easy. First, make sure you place it on a flat and stable surface. You can then start loading your sheet pans or bun trays onto the tiers. Remember not to exceed the weight limit of 550 Lbs in total, and each shelf can only hold up to 27.5 Lbs. When moving the rack, use the four casters at the bottom to roll it around. As for maintenance, simply wipe it down with a damp cloth regularly to keep it clean. Avoid using abrasive cleaners that could scratch the aluminum surface. This rack is NSF certified, so you know it meets food - safety standards, but always follow good hygiene practices when using it in your commercial space.