I brewed a batch of American Cream Ale on Sunday. I checked it this AM and it was bubbling away in the airlock. When I came home from work the blowoff had occurred. I lost the airlock but not much of a mess. I added the blowoff tube to a tube of water and its bubbling away.
I’m wondering if #1 its contaminated and #2 how long do I leave in the blowoff tube?