Nancy Sinclaire wrote:An old sheer curtain draped over the bin works to keep them in. No need to close at the bottom because they do not seem to fly under. For the fruitflys in the house get a nice bottle of red wine. Put an inch into a glass and stir in a single drop of dish washing liquid. Put this on top of a coffee can on the kitchen counter. Fruitflys seem attracted to the top edges of things. Pour a second glass for yourself. Count the fruitflys that land in it while drinking. Next night hold the first glass up to the light and look from the bottom up into the light. Count the flies. Satisfaction. No need to replace it, just keep on using. Add water if needed to maintain level. Drink another glass of wine. This evening there should be far less fruit flies.
Oh, I see now you said fungus flies. Fruitflies are nice guys compared to fungus flies. Maybe search for standing water such as the refrigerator drip tray. Maybe pour a torrent of hot water down sink, tub, floor traps. Maybe diatomaceous earth. Yellow sticky boards. Stop feeding and watering the bin. Add dry bedding over the top. Flip the bin top to bottom, maybe even into a second bin thus covering the old top completely.