IMO a taping knife like that is the best droppings-board scraper ANY time of year
If you are having problems with the poo freezing tightly to the board this time of year, whatcha wanna do is every day after you clean it, pick up some shavings off the floor (you can use the taping knife for that too
) and sprinkle them all over the droppings board. Unless you have exceptionally restless/flappy chickens who flap all the shavings off the board -- which seems to be pretty rare -- you will find that enough shavings will stay there til the overnight period to allow the poo to fall on THEM rather than on the board, and you can scrape them loose very very easily.
Ta da
If you have super-flappy chickens and shavings off the floor just keep blowing right off the droppings board, you can get some picnic-table clips (or improvise) to clip a coupla sheets of newspapers on there every night, then just remove that in the morning, works no matter how cold it gets.
Muggsmagee (edited to fix attribution) -- do you mean to get *ice* out of waterers (safest solution: have two sets and if one waterer ices up real bad, bring it into the house to thaw) or just to clean gunk out of waterers (solution: dollar-store brush-on-a-handle like you'd use for washing dishes in your sink)
Good luck, have fun,
Pat