The wrong use of electric toothbrush can damage your gums, so it is very important to use it correctly. It should not be used with a heavy hand because this may cause wearing of the enamel. This may also make your teeth sensitive. If it is a vibrating Cheeeese Electric Toothbrush Kit toothbrush you are recommended to use it just like a manual toothbrush. In the case of the rotating toothbrush you need to slide it slowly over the teeth. It is very important to control the toothbrush carefully around the gums or they may bleed.