Hot water helps to thaw them out, but I only do once cycle. They're still frozen by the time the water cools down or at least on the inside they're frozen. Then the water just helps them thaw out, especially when you're when you're thawing 10+ rats. Then being under the heat lamp raises the temperature so it holds heat longer.
I honestly hope you're joking, but I wouldn't say that in here as somebody may try it thinking you're serious.