Guys I need some help. I got two sacks of crawfish I need to keep alive till tomorrow. Wife won't let me take the shelves out of the fridge like we used to do in college. What can I do to keep them alive in ice chests? I put ice in the bottom of a 150 qt chest, put down a burlap sack, and then put the sacks on top. They just don't seem very cool. Should I put another layer of burlap and some more ice?