Thanks, @CKuhns! The depletion of the sugars has slowed from .004 per day to .002 per day, and I'm really close to the 1/3 break. The advice I got from someone else was to add 1/4 tsp yeast energizer and 1/2 tsp Fermaid K, then re-pitch more Cote de Blancs, properly rehydrated and acclimated to...