We had drain-flies in the house for a while. Like 3 months. Thankfully, our friend bnmng helped us ID them. And IDing them helped us manage them.

The drain-flies are most definitely living in the planter. Covering it with screen helped. They were also living in an old water meter that was tucked into a corner, the tadpole habitat, the condensed water underneath the granite that covers the planter so the cats don't pee in it, and in the water that puddles under the bathtub when the kids forget to put the mat down.

We first noticed the problem in April. It is July now and we've finally got them under control. We still have a few of them here and there, but the are completely under control. If I forget to dump the mop water, we get a bug bloom. If the kids leave their water experiments out, we get a bug bloom. Any standing water in the greenhouse and they are on it, in it, and breeding. As long as we eradicate their habitat though, the problem is totally managed.