Making my Mexican Dunkel, the LHBS was out of Mexican Lager yeast. So I picked up a packet of Imperial's "Urkel" (I suppose "Urquell" was trademarned) yeast, put it in the bottom of my lagering fridge and forgot about it until I was ready to brew. Well, I keep my lagering fridge pretty cold.... Didn't make a starter so, bottom line, the yeast froze. I thawed it out and pitched it about 36 hours ago. No activity. My question: Have any of you had experience with frozen yeast? LHBS is doing curbside delivery, I could go pick up two packets of Saflager so that's a fix, just don't want to drive over there if I don't have to. So, any of you had any similar experience and how did it come out?