How to clean the household electric water heater?

Cut off the power supply before cleaning the water heater, and use the impact of water to clean the water heater. Before cleaning, drain all the water in the water heater, then pull down the shower and other hardware, leaving only the cold and hot water pipes, then install one end on the faucet and drain the water from the other end. Repeat several times to clean the water heater. Regularly carry out system blowdown to prevent pipeline blockage; And clean the water tank to ensure the water quality is clean. When discharging sewage, as long as the water inflow is normal, just open the drain valve until clean water flows out of the drain valve. Regularly remove the dust and dirt on the transparent cover plate of the solar collector, keep the cover plate clean and ensure high light transmittance. Cleaning should be carried out in the early morning or evening when the sun is not strong and the temperature is low, so as to avoid the transparent cover plate being crushed by cold water.