I brewed a nut brown this past Fri,from a kit, and I have not seen my air lock move at all. I have been checking it everyday. I hit all my numbers so Im not sure whats going on. It is in a bucket so I cant really see anything. I popped the lid off and there is some froth on top. Should I let it go? I am new to this, but not my first batch. just have come across this yet. Any insight would be greatly appreciated.