I was worried that I’d cooked and killed my yeast when I activated it the other day. The idea is to wake it up in a warm bath of clean water and then add it to the wort; I misjudged the speed at which our simmer burner could heat 1/2 cup of water, and it got up to 100° before I pulled it off. I added it on Monday but it wasn’t doing anything until late last night, and this morning there was about an inch of krauzen on the top of the fermenter. Usually by this point it’s spitting bubbles out of the airlock. If there isn’t more of a reaction by tonight I’m going to go get some replacement yeast and throw it in for good measure.