Winter cycles of freezing and thawing break down natural waste and help it to compost faster. Remember, it also releases moisture to evaporation.
Can I just forget about my compost pile? Don't let your compost "freeze dry", it needs moisture to keep working. Ice in the pile will discourage rodents from moving in. Keep it moist!
What about snow? Did you know that adding snow to your compost pile means you're also adding extra nitrogen? Sprinkle topsoil over the snow in your compost ot keep the nitrogen in the pile. Snow on and around your pile insulates it from drying winter winds, but not as well as a good bin or bags of leaves.
Can I use grey water? Yes, leftover coffee or tea (a bit of cream is fine), aquarium water, and rinse water have a double impact by adding both moisture and heat. Some die-hard gardeners even shower with a bucket. Tip: adding moisture early in the day could kick-start the process and keep your bin working until sundown.