My mattress cover I received for Christmas is new. From the first time this mattress cover was used it started blinking after about 30 minutes. I only like to heat up my bed and occasionally want to turn it on again in the night. I can't do this because it starts blinking and you can't turn it off. You have to unplug and start process all over. Very annoying. I hate this blanket. Hopefully this one is defective or this problem can be resolved.