Two things: First, it seems more likely you got some bacterial contamination from your skin than from gear. Did you use alcohol first to thoroughly clean the injection site? If not, piercing the skin can push skin bacteria beneath the surface and infect you. Also you should never touch the pin with your fingers. If you do, best to clean it with alcohol. Second, I'm not so sure about baking gear. It does not hold up well to heat. Heating it to 250 is likely to denature the steroids and change them into something that does not work like a steroid. Some steroids can take heat, but most cannot.