Sterilize Your Site For sites, most pumpers prefer the abdomen, but anywhere that has padding will do. Normal skin contains bacteria, so it's best to use a sterile prep on the new site prior to inserting the infusion set to reduce the chance for an infection.
Bacteria move on the skin, so a wide swath is smart.
The person on the left is using betadine, which is a great bug killer and also shows up well for the camera.