This is my first brew in my new apartment, and since I don't have an outside area (not to mention it's freezing out there!), I have to brew on my stovetop. Only problem is my stovetop isn't powerful enough to keep a boil without the lid on. Even partially covered the boil dies. I'm trying to boil 2 gallons plus extract. I know the general rule that lid on leads to DMS, but how bad am I looking?