so this would be my first encounter with a possible infection, and its two batches @ once. i've recently moved and have a seperate room that i ferment in, and i usually have the window open for temp control. i'm wondering if something came in thorugh these fermenters as the lids are not air tight, one is a conical and the other in a seconddary that i just used foil to cover. its like a off white film on top of the beer, with no negative effect on aroma or flavor. i'm going to be quite upset as the beer in the carboy is my xmas beer thats been aging on oak cubes for a month this is also the first time that i've used starsan, i used to use an iodine based cleaner. could it be residual sanitizer?