Here's how to use and take care of your 'Guillermo the Slayer' sweatshirt. First, put it on and enjoy its comfort. When it's time to clean, simply throw it in the washing machine on a cold cycle. Make sure to turn it inside out and wash it with similar colors. If it gets dirty, use non - chlorine bleach only when really needed. After washing, it's best to hang it to dry. But if you're in a hurry, you can tumble dry it on a cool or low - heat setting. Just keep in mind that fabric softener can make the colors fade, so skip it. Also, don't try to iron it or take it to the dry cleaner. Following these steps will keep your sweatshirt looking great for a long time.