I have had little tiny flies, that have been in my dining room for about 6 months now. I did have a chilli plant that they all seemed to fly around (though they were not noticeable every day and you only ever see one or two at a time). I threw the plant out a month ago, and have since started growing some new chilli plant seedlings in the same area, and lo-and-behold the flies are back. We do have a couple of other plants in the room but you don't really ever notice any of the flies around them. They seem to like the soil more than the plants themselves.
Anybody have ANY idea where they could be lerking and what they could be? I can't work it out because it always appears like there is just one or two, but no matter how many a squash, there always seems to be one more flying around.