I'm currently brewing this: https://www.brewersfriend.com/homebrew/recipe/view/390683/christmas-beer I am 16 days into fermentation and my gravity has gotten stuck at 1.028. I tested it yesterday and today and it was exactly the same. I think the main culprit is the temperature not being high enough. So yesterday I moved it into a warmer room where it's been at at least 20 C. I've seen no change in gravity today however. I have used enough yeast. It was a packet of dry yeast that I simply added straight into the cool wort 16 days ago. My FG should be 1.011 but it seems I'm a way off that yet, however 16 days is surely enough to reach that. What's going on?