The silky, smooth feel of shaved legs sure makes you feel and look sexy. But the sad part is, razors become dull before they have performed five shaves. Razors are expensive! You can keep yours longer with this little trick. Men, you can do this too. After each use, give it a quick blast from the hair dryer. The moisture that lingers on the blades leads to rust, causing dullness. Keeping the blades dry every time will ensure it lasts for at least 15 shaves.