I just had an issue with an oatmeal stout. I'm just starting to brew beer at home (BIAB) and I think I made some mistakes.
I had my water at 80°C hoping for the decrease of temperature to 72°C when adding my grains. So I just kept at it not knowing this was a problem. So my OG was at 1.070, recipe indicated it should be at 1.068. Then I put the beer in the fermenter and after 7 days the gravity dropped to 1.031, after 6 more days gravity was still at 1.031. I added another pack of Yeast Safale S-04, swirled around hoping for yeast to activate. A week later, nothing. Gravity was still at 1.031. So I just bottled after adding some priming.
A week later, my beer is flat and has too much body. Carbonation seems to be not happening (or struggling) since the beer is too dense.
Another strange thing I experienced was my airlock sucking my sanitizer solution into the fermenter. I don't know if this may affect something in the fermentation.
I'd really appreciate some insights if you know what is happening here. Cheers!