This bottle warmer would be perfect if it actually worked all the time but it does not. About 1/2 or more of the time, the bottles are cold even though we changed nothing and followed the directions. It is just hit and miss with it. In addtion, there is a burning odor in the room from the warmer and when you remove the bottles and dry them off you are then left with brown circle stains on the towel. We can not figure out why the brown stuff is being generated but we can see it at the bottom of the warmer and assume it is realted to the burning odor.