There are several natural ways to repel flies, including:

• Essential oils: Lavender, eucalyptus, peppermint, lemongrass, and citronella essential oils can be sprayed around the house or used in diffusers to create a pleasant aroma while deterring flies.

• Herbs and plants: Basil, cloves, mint, lavender, marigold, rosemary, yarrow, and pitcher plants can be planted in gardens or placed in pots around the house to deter flies.

• Cleanliness: Keeping the house and patio clean, sealing rubbish bags and bins, and cleaning garbage cans frequently can help prevent flies from breeding and feeding.

• Fly traps: Fly traps that enable flies to enter but not escape can be effective in reducing fly populations.

• Yellow light bulbs: Yellow light bulbs can be installed to repel flies, but they need to be placed all around the house to be effective.

• Vinegar: While vinegar attracts flies, it can be used to create a homemade trap by mixing it with dish soap in a bowl. The flies will be attracted to the aroma but will become trapped by the surface tension created by the soap in the liquid solution.

• Other natural solutions: Hydrogen peroxide, vodka, and witch hazel can be used to create sprays that repel flies. Sugar-sweet flytraps can also be made using apple cider vinegar, sugar, water, and dish soap.

Overall, prevention is the best way to repel flies. Keeping the house clean, sealing rubbish bags and bins, and using fly traps can help reduce fly populations. Using natural solutions like essential oils, herbs, and plants can also be effective in deterring flies.