Learn to use solar heat to kill bedbugs with this video! 1. Take a dark plastic bag or a vacuum bag. 2. Make sure it is intact. Don't use bags with holes! 3. Place a piece of clothing or bedding in it. Don't over fill the bag! 4. Close the bag. 5. Make sure that it is firmly closed and has no openings. 6. Place the bag on a hot surface under the direct summer sun, preferably on a concrete surface which was already heated by the sun (terrace or a balcony), but you can also put it in a car. 7. After a while gently turn the bag over, to expose the other side to the solar heat. 8. In the end throw a bag and use another next time.