Once you get it to a boil, then you can take the lid off. You want to boil off the DMS, but you want it to get to a boil! I just bought a turkey fryer last week- haven't yet fired it up but am looking forward to it. I've been boiling on my stove top. Now, I want to buy a keggle and do 10 gallon batches. It never ends!
Come to the 10-gallon dark side Yooper San.....uh....but buy some more cornies first.