I have an IPA that I pitched 2 vials of liquid yeast in and it started about 4 hours later. There was airlock action for about 2 1/2 or 3 days. My OG was 1.076, I just checked it and it was at 1.029. Not seeing any more activity. Fermentation temp fluctuated from 68.5 - 71.0. Any ideas on how to...