Did a Russian Imperial Stout a week ago. Fermented well. I had the fridge set at around 63. I noticed that the stick on temperature gauge on the side of my fermenter read 77! Could it really have been 10+degrees warmer in the fermentation chamber than the ambient temperature? If so, will the beer taste astringent? I checked a sample for FG today, and it didn't' taste notably astringent. Total abv=9.6%