I have a saison fermenting right now at a gravity of 1.010, and OG was 1.064. It has been 4.5 weeks now. I have it sitting in a warm water heated by an aquarium heater. Temperature of the saison is 80F. Should I try rousing the yeast, or should I just let it sit? Fermentation doesn't look too active, but I know this about that yeast.