What are some signs of infection? Everyone advices that we anally watch over our wort so that infection won't set in. But what would be a sign that your beer was infected? I just put a light lager in the secondary to begin the lagering phase. I noticed some little target like looking films on top of the fermented beer. It literally looked like a perfect round target. I felt it with my hand and it was very cohesive. Not sure if this means my beer is infected. It took forever (about one week) for the fermentation to begin. I had to check the gravity several times to see if anything was happening. Any thoughts?