To get rid of small flies effectively, follow these key steps:

1. Remove Breeding Sites:
   • Identify and eliminate all breeding grounds such as moist areas, drains, garbage disposals, and any organic debris.
   • Use an industrial-strength drain cleaner like Invade Bio Drain Treatment for drains.
   • Dry out soil and cover with a 2-inch layer of sand to prevent breeding in plants.
   • Replace sewage-infested soil if dealing with Phorid flies.
   • Clean and caulk cracks and dry moist areas to remove larvae habitats.
   • Store meats and cheese properly at 30-36°F to prevent infestation by cheese skippers.
2. Use Traps:
   • Vinegar traps: Use apple cider vinegar mixed with a few drops of dish soap in a bowl or jar. Cover with plastic wrap with holes or use a paper cone funnel. Flies get attracted but cannot escape.
   • Beer or wine traps: Leave out open bottles with stale beer or wine which trap the flies.
   • Fly light traps attract various small flies for capture.
3. Insecticides and Sprays:
   • Use non-residual pyrethrin sprays like Stryker 54 Aerosol for immediate kill.
   • For longer-lasting control, use Doxem NXT, an aerosol combining insecticides and growth regulators, effective up to 180 days.
   • Use insecticidal sprays safe for indoor use, based on natural oils like geraniol or lemongrass.
4. Preventive Measures:
   • Keep sinks, garbage disposals, and trash cans clean.
   • Empty trash cans frequently.
   • Cover and refrigerate fruits and vegetables.
   • Check and clean refrigerator condensation pans.
5. Additional Tips:
   • Pour boiling water down drains regularly to kill eggs and larvae.
   • Use sticky traps designed for gnats and flies.
   • For outdoor control, fix standing water and drainage issues as gnats breed in stagnant water.

These steps together help eliminate the existing flies and prevent future infestations effectively.