ISSUE: The infection control department was notified of a “gnat” infestation in the burn unit. PROJECT: An immediate investigation was initiated upon the notification of this event. The “gnats” were spotted in a single room. The room was examined for the usual factors i.e., (such left over food, plants, fruits, and leaky faucets) without any significant findings. The cabinets, mattress, and bed were also examined and found to be in good condition. As an empirical solution, the patient was moved to another room with a new bed and mattress. After a few days insects once again were noticed in that room. Our attention then focused on ruling out myasis in the patient's wounds. In collaboration with the burn unit attending, our hospital epidemiologist conducted a full body examination, without any findings to support that condition. The insects continued to be observed in the room and in collaboration with the unit's charge nurse a single insect was captured and the hospital's exterminator was consulted. RESULTS: The insect was identified as a “moth drain fly” and the exterminator suggested that these insects are usually found in infrequently used sinks. Upon investigation of all sinks and drainage outlets in the unit, insects were found nesting in an open faucet drain in one of the rooms. We hypothesized that something particular about that specific patient's wounds attracted the flies only to her rooms. The source of entry was sealed and “gnats” have not been observed in the unit again. The patient was alert and very cooperative during all of the investigation. LESSONS LEARNED: Although infrequent, insect infestations in the hospital setting can create a nuisance in patient care and a negative image for the hospital. The resolution of this event required interdisciplinary action involving nurses, physicians, infection control, environmental services, the hospital's exterminator, and the patient itself. The patient was very appreciative of the team's efforts and the openness of the investigation. This event also illustrates the importance of finding the ultimate source of the problem, which in this case, led to a change in cleaning and maintenance policies of a unit.