I brewed my first quad a couple weeks ago. OG was 1.110. I started fermentation at 66 degrees and held there until gravity was around 1.032. I took it out of my chamber to bring up to room temp, our house stays around 70-72 degrees. I checked two days ago and it was holding steady around 70 degrees. My plan was to bring it up to around 74, per various readings. I just checked and some how temp dropped to 68. I checked my gravity and its at 1.020 and I was anticipating a 1.018ish FG. My question is, should I still bring the temp up to 74 even though it dropped, or leave it at the current 68?