I use a Maze Compost Tumbler, which is a 2-sided rotary composter, to compost kitchen scraps. By volume, I add equal parts kitchen scraps, sawdust and peat moss whenever I add the scraps. It is rotated twice a day.
The lids on this composter are kept shut. It has vent ports which I keep closed. It is in a re-purposed stock trailer so it gets some sunlight, but not a large amount of it. However, I cannot put it outside the trailer because bears would break into it to eat the scraps.
The problem I am having with it is that it has become a breeding spot for Gnats. The compost is used in a vegetable garden, so I am not willing to use poisons to kill them. We placed a fan on it to blow the the gnats away, but if there is any decline in the population of gnats because of the fan, it is negligible.
Does anyone know a non-poisonous way to rid it of gnats?