Blade lock issues can causes your trimmer make noise. In order to prevent the blades from making noise, you should put special oil regularly into the blades of your hair clippers. This will keep it sharp, smooth, and easy to use. Learn Blade lock issues can causes your trimmer make noise. In order to prevent the blades from making noise, you should put special oil regularly into the blades of your hair trimmer. This will keep it sharp, smooth, and easy to use. Learn How to Maintain Your Hair Trimmer the Best Way @ http://www.hairclippershq.com/how-to-store-and-maintain-your-hair-clippers-the-best-way

Have you lubricated the blades? You can buy spray lube (Remington Shaver Saver) for this purpose.