In article ,
Vortex wrote:

A few months ago we purchased a councol subsidised composter for
garden/kitchen waste. It has now reached a "steady state" where
despite having stuff put in every day the level doesn't go up at
all. I assume compost chemistry is in action.

One unpleasant side affect is that it has become home to a dense
swarm of annoying small flies.

Cap it off every now and again with a few shovels of
earth. Also look out for any entrance holes dug
around the bottom rim... it could mean that you have
attracted rats.

--
Tony Williams.