Its been a little over a year since I brewed my first and only batch, and now I've decided to give it another go. I have all of my equipment ready, my buddy here who wants to help, but no airlock. I've search and searched, but to no avail. Can I still go ahead with the brew and just cover the hole in my buckets lid with plastic until tomorrow or something? I'd really like to brew tonight, but all the brew supply stores are closed for the night. What are my options?