I racked a Midwest Cherry stout into secondary 5 days ago after 12 days in the primary. There was no bubbling in the primary for about 5 days. I was disappointed with the SG. The OG was 1.043 and when I racked it was 1.020 . I expected a FG of 1.010-12. I felt the temperature was a bit too high 72 so I placed a wet towel on the secondary and now the temp is 68. Bubbling has started again about every 5 minutes with some foam on top. Is this good or bad or something else?