Fruit flies appeared in my kitchen about ten days ago and I can't seem to shift them.
seem to congregate by kitchen sink and compost bin on the worktop. There's no rotting or even soft fruit or veg out (only onions and fresh apples I've bought since the infestation). I've bleached the drain, compost bin and kitchen scrub brushes. Have also set out vinegar traps that have killed some. Infestation continues but can't for the life of me find the source. Any suggestions?