If you have been using a different brand of electric shaver, please allow for some break in time. Although most shavers have somewhat similar shaving principles, their "in use" applications differ. Give yourself up to 4 weeks to adjust to the new shaver.
Why? Well, every time you shave with a razor you actually take off a very thin layer of skin. With electric shaving, you are shaving at or below the skin line, without actually shaving the skin. Do not switch back and forth between blade shaving and electric shaving if you want to achieve the many benefits of electric shaving. Be determined and stick with your decision to use an electric shaver.