We let them dry (standing on newspaper, in the general vicinity of a radiator if necessary) and then clack 'em, like Kerrymum.
JackieNo, you can get plastic boots you know - possibly sweaty, but they're not worn for long after all, and then they can be worn again next day if necessary.
The bit I hate is the laces wrapped around underneath the foot - they get really crunchy and disgusting.