I also make use of natural fragrances that are vaporised by my air purifying machine to repel flies from the home. Flies are attracted to food odours and this machine removes these odours and replaces it with a natural blend of essential oils. So no need for poison to be used in the home to kill flies. The flies hate the fragrance and will leave. The machine can also be used outside as long as there is access to a power point. Fragrances can be purchased from us separately.