When it comes to Gillette, the sharpness of our blades should last a lot longer than a week. We're sorry to hear this wasn't the case with your recent purchase. As you may know, a best practice for razor life is to rinse the razor head from the back in warm running water and never directly wipe the blade surface off. When not in use, all your ProShield razor to dry, with the blades facing up, away from moisture. If you'd like to tell us more about your experience, feel welcome to reach out to our Product Specialists at (800) 445/5388, when you get a moment.