Fire Hazzard!! Check your machine cords both to the plug in and to the presser foot before you begin each sewing session. If you get in the habit of unplugging your machine when you finish a sewing session it's much easier to remember to check the cords when you start up. Cords are prone to cracking and fraying over time and you won' t even notice that it happened until it's too late if you don't check regularly.