evidence: Any time you inject intravenously, you risk pushing bacteria, fungi, and any other infection-causing microbes that are on your skin directly into your bloodstream. It is therefore extremely important to thoroughly clean your injection site prior to getting off. Alcohol pads work well for this purpose, but be sure to wipe in only one direction and not in a circular motion which will cause the dirt and germs to stay on your skin. Rubbing alcohol, hydrogen peroxide, or plain old soap and water or any other type of cleaning agent or disinfectant also work fine. Be sure not to touch the injection site with your fingers after you’ve cleaned it. Routinely cleaning the skin prior to injection is one of the most important things you can do to reduce your risk of endocarditis, blood poisoning, and similar infections (discussed in chapter 3).