House flies can be effectively dealt with using a combination of methods focusing on exclusion, sanitation, traps, and sometimes insecticides.

First Step: Exclusion and Sanitation

The key to controlling house flies is first to ensure cleanliness and remove sources where flies can breed or feed. This means:

• Cleaning trash cans and disinfecting them regularly.
• Removing food residues and flies' breeding areas.
• Sealing windows and doors or using screens to keep flies out.

Natural and DIY Traps

Several natural remedies and DIY traps work well:

• Apple cider vinegar with dish soap in a jar covered with plastic wrap with holes attracts and traps flies.
• Sticky flypaper or fly traps placed near fly congregation areas catch flies effectively.
• Light traps attract and kill flies electrically or trap them on a sticky surface.

Natural Repellents

• Essential oils like lavender, peppermint, eucalyptus, and lemongrass can repel flies when diffused or sprayed around entry points.
• Planting herbs like basil, marigold, and lavender around your home can also help keep flies away.

Insecticides for Immediate Results

For quick elimination, pyrethrin-based insecticide sprays or aerosols can be used, especially on surfaces flies rest on. However, they provide a short-term effect and should be used carefully indoors.

Additional Tips

• Fans can be used to blow flies away since they are weak fliers.
• Citrus peels and cayenne pepper sprays may act as natural repellents.
• Carnivorous plants like Venus flytraps can help catch flies naturally.

Combining these methods—cleaning and prevention, natural traps, repellents, and insecticides if necessary—can control and reduce house fly populations effectively.