In my area, we get municipal composting. In the winter, we can leave a bin (around 5L) out, and once a week, they pick it up and compost it in their giant compost bins.
The problem is now that our temperatures dropped; anywhere from -2C to -25C. Even if I leave the compost bin out early morning the day of (although I usually do it the night before), the compost freezes solid. I'm not sure why; I suspect it's water from the denaturing organic material (greens).
I tried leaving the bin in the sunlit areas in higher temperatures (-2C), but to no avail. I tried leaving it in the garage, but that's also ice-cold. I intended to salt it, but I think that will destroy the compost value of it.
Is there any way to thaw/defrost the compost, other than leaving it in our house? It will stink. Right now, the bin is 50% full with a solid, frozen block of material.