Quite frankly I just don't worry about it. I just do basic sanitizing steps (good ole Star San) and just make beer. It takes really bad luck or carelessness to end up with infection. Just imagine the people brewing beer thousands of years ago. Do you believe for a second they had Star San or bleach or whatever available to them? Nope. You can bet that had infection been a signficant problem that brewing would have been quickly ignored.