To get rid of flies in the house effectively, start with good sanitation and exclusion by removing food sources and breeding areas. Natural methods include:

• Using apple cider vinegar mixed with a few drops of dish soap in a jar covered with plastic wrap to trap flies.
• Placing essential oils such as lavender, peppermint, eucalyptus, or lemongrass around entry points as natural repellents.
• Using sticky fly traps or electric light traps placed strategically to catch flies.
• Planting herbs and flowers like basil, marigold, and lavender to repel flies.
• Setting up DIY fly traps using sugar and yeast mixtures.

For more immediate results, pyrethrin-based insecticide aerosols or residual sprays can be applied but should be used cautiously indoors. Additional steps such as hanging a clear plastic bag half-filled with water or placing petroleum jelly near drains can help control flies further. Overall, a combination of cleanliness, natural repellents, traps, and possibly insecticides offers the best house fly control.