I just opened the packet and poured it in and then stirred it, while steam was still rising up, lol.
I was noticing the temp of my Pumpkin Ale on friday and it stopped steaming at around 120-130 degrees, and if it was still warm in the morning, I'd guess you were quite hot when you pitched the yeast. I guess if it were very cool in the house that would make a difference in the amount of steam.
I'm a real noob believe me, but if these guys think it can be salvaged by putting yeast in now
, I'd be very encouraged.
Good luck, and I hope you post the results of this!