The electric kettle can't heat the milk, because the sugar in the milk and protein are easy to carbonize after being directly heated, and will be attached to the heating wire, so the heating wire looks very black. Just soak it in water, and then gently brush it down with a wire brush.

Extended data:

1. Electric kettles generally have plugs with grounding electrodes and should be connected with sockets with grounding sockets. When using, pay attention to completely insert the socket of the electric kettle into the socket. Remember to always keep the plug, socket and switch device of electric kettle dry and clean.

2. Please turn off the kettle switch before turning on the electricity. Be sure to check the switch position of the electric kettle before electrifying to ensure that the power switch of the kettle is in the off position, so as to prevent the impact of current from damaging the body and shorten the service life of the kettle.