Vortex wrote:
Hi There,

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.

You have it badly set up. It should be a not unpleasant smell. You put
a layer of waste covered with a layer of cellulose and soil or similar.
The process thus goes on under cover.

How many others are having the same problem? Take a look at what the
more successful users are doing.