1.Please be really careful when you are using the tools, and you’d better keep it somewhere kids can’t reach.2.Please switch to the 392? model, when not using the soldering iron and please do not keep the soldering iron working under high temperature.3.When welding, do not use too much pressure. As long as the iron tip fully contact the solder joint, heat can be transferred.4.To avoid oxidation, please clean soldering iron tip and "tin" all faces of tip with a coating of solder after using. If there is black oxide on the iron tip, please clean it by WET sponge firstly. This very beginner friendly iron should be in every home's basic tool box, especially when you have various kids' toys.