In the case of medical equipment, the gold standard to prevent contamination from previous patients' biomatter is to use new equipment each time. There's a demo

In the case of medical equipment, the gold standard to prevent contamination from previous patients' biomatter is to use new equipment each time. There's a demonstrably lower rate of infection than even if the equipment is cleaned to approved standards. I believe I should be able to find the paper I read discussing a while back, if you'd like.