I noticed when pitching that the yeast seemed a bit 'clumpy' but didn't fret too much, just gave it a good stir and let it get on. It seemed to be a pretty weak fermentation with not a lot happening through the airlock. Now it is 8 days gone and nothing has been out of the airlock for about 2 days. I checked the SG and it is about 1.015. I've given it a right good stir to see if that'll help, but if nothing changes, what should I do? :wha: