To use a rechargeable electric toothbrush, simply put the toothpaste on the brush head and hold the brush tilted at 45 °, as you would if it were a manual toothbrush. Then turn on the rechargeable electric toothbrush and move it from tooth to tooth. The small brush heads in rechargeable electric toothbrushes normally brush one tooth at a time, depending on the size of your teeth. Guide the electric toothbrush along the outer, then inner, and finally the chewing surfaces of your teeth. Even with a rechargeable electric toothbrush, you need to brush your teeth for about two minutes to make sure you clean each tooth. When brushing is complete, simply rinse the brush head with water and let it dry.