(Psychoda spp.) The immature stages of moth flies live in the organic debris in drains, and in the debris that collects around sinks and toilets. The lifecycle requires about 30 days to complete and the adult flies may live about 3 weeks. The adults usually remain close to the larval breeding site.
Thoroughly cleaning around sinks and toilets may help to eliminate infestations. When large numbers of these flies are present there may be a clogged drain. Temporary control can be achieved by pouring boiling water down the drain, then removing all the organic debris.