I just brewed my first batch and it is sitting in the primary right now. I am concerned that I pitched the yeast too early (I pitched them at 85 degrees because I couldn't get the wort to cool down fast enough) and may have killed them... How long do I have to wait before I see any signs of fermentation in the airlock? It has been sitting for 12 hours at 72 degrees with no visible changes. Also, could the yeast have been sitting too long before I pitched them? I re-hydrated them just after I started cooling the wort, but when I ran out of ice, it took the wort 3 hours to cool! I sealed the wort in the primary to prevent infection, but the yeast was sitting at room temp in a saran wrap covered measuring cup for that long. Bottom line: I think I made a newbie mistake, and want to make sure my beer will come out okay.