Small flies in our house and can't get rid of them
We have these small flies that seem to be attacked to our kitchen and bathrooms. They are bigger than fruit flies but smaller than the common fly. When you kill them they have blood in them. We don't allow food to be out and the dirty dishes are cleaned in the dishwasher. In the kitchen they hang on the ceiling and near the sink drain. They aren't attacked to apple cider vinegar since I've tried that. Coffee with sugar and milk attracks some. Any ideas short of opening the windows and freezing them out?