Yes, I'm on my way!
But back to the real subject, don't have any problem in my greenhouse. I don't use it much because I find the space under the Cherry Trees (no wind, so no wind chill so no frost in coastal Devon), far better.
Mind you, I have never thought of it before, my greenhouse (also cheap flexible plastic 8 by 8 by 15ft) is surrounded by a hedge and between the greenhouse and the hedge is my long thin compost heap, so perhaps that might be helping!
My greenhouse (and garden) is also a writhing colony of sandhoppers (crutacians) which devour and shred dead vegetation at a phenomenal rate cutting it into tiny bits, including eating fungus off plants and all sorts and may play a significant part in keeping overwintering plants healthy and clear of potentially rotty bits. It seems they have given up the sea and moved 0.5 mile inland to eat my dead plant residues. All still water in my garden is full of them and every time I turn anything over, a million hop out. The birds sit is wait!
I have seen people selling worms for composting - how awfully slow. You wouldn't believe how quickly dead vegetation becomes compost with sandhoppers!