Have you ever been on an outing where you were looking forward to sharing some wine with good friends at a local park or nature reserve? The weather is perfect, and everyone is in a great mood, but no one bothered to bring a corkscrew to open that special vintage you had been saving for the occasion.
The lack of the implement becomes the “fly in the ointment”, a small thing that can potentially ruin the event.
I’m amused by that trite saying because I’ve never known flies to be attracted to salves and creams. If a fly alights in a jar of skin cream, how can it possibly ruin the entire contents of the jar? Flies are a dangerous pest when they get inside the house and begin to look for food, a place to lay their eggs, and to carry on their other disgusting activities that flies are well known for. Fly swatters, flypaper, pesticides, and vinegar are all ways to get rid of flies but another way to control them is with your home’s HVAC system. Note that the word used in the previous sentence is to “control” instead of “kill” because even the best AC cannot produce the temperatures needed to kill them. The best thing an HVAC system can do is slow them down a bit with their breeding and buzzing. Flies like temperatures between 20°C to 25°C (68°F to 77°F) but they can breed quite rapidly in warmer environments up to 38°C (100°F). At 15°C (29°F) they stop all activity. The better solution is to prevent them from getting inside the house in the first place. It’s also wise to keep your HVAC in a fly free condition with twice-yearly service and cleaning by a qualified HVAC technician.