Using the Nella 23-Liter Oil Filtration Machine is a breeze. First, make sure the machine is plugged into a 120V/60HZ power source. Pour the used oil into the oil tank. The machine will start filtering the oil at a speed of 13.3 liters per minute. When the filtering is done, you can drain the clean oil through the rear drain tap. For maintenance, remove the stainless steel filter screen and filter paper bracket regularly to clean them. Also, check the motor overheat protection system to ensure it's working properly. Don't forget to cover the machine with the stainless steel lid/night cover when not in use to keep it clean. And always follow the electrical safety guidelines when operating the machine.