It is important to turn off or disconnect the pre-heating electric blankets before use. Unless the blanket is an all-night blanket, the blanket should be turned off or disconnected before going to sleep. Electric blankets should be unplugged immediately if the blanket begins to smoke, burn, or discolour. This is an indication that the blanket is burning internally. It is also important to turn off or disconnect the blanket when it is not in use.