Using this on-off switch is easy. First, make sure the washing machine or vacuum cleaner is unplugged from the power source. Then, locate the old switch and carefully remove it. Connect the new switch using the 4.8mm spade terminals, following the original wiring. Once connected, plug the appliance back in and test the switch. When using, avoid overloading the switch with more than the rated 6Amp, 250Volt AC. Keep the switch dry and away from moisture. For maintenance, periodically check the connections to ensure they are secure. If you notice any signs of wear or damage, replace the switch promptly. With proper use and maintenance, this switch will serve you well for a long time.