Using the MultiChef is a breeze. First, plug it into a 208 - 240 - volt outlet. You can then set the cooking functions like baking, toasting, melting, roasting, or reheating using the digital display. If you want to cook multiple items at once, use the multi - start feature and set the 4 separate timers accordingly. Place your food on the 4 standard cooking racks or 12.75'x12.75' trays. When it comes to maintenance, keep the cooking chamber clean after each use. Wipe it with a damp cloth. Since it doesn't need ventilation or exhaust hoods, there's no need to worry about those areas. Also, make sure to follow the safety guidelines as it is UL Canada & USA and CE certified. If any parts need replacement within the 1 - year warranty period, contact the manufacturer for parts and labor service. And remember, this NSF - certified product is designed for food safety, so always handle food properly while using it.