To get rid of small flies (such as fruit flies or gnats) in the kitchen, here are effective methods:

• Use an apple cider vinegar trap: Pour some apple cider vinegar (ACV) into a glass or jar, add a few drops of dish soap to break the surface tension so flies drown, then cover with plastic wrap punctured with small holes or use a paper cone as a funnel. Flies are attracted by the vinegar smell, enter the trap, but cannot escape.

• Clean potential breeding grounds: Remove and discard overripe or rotting fruit, clean the sink drain by pouring boiling water down it to kill eggs and larvae, and regularly empty and clean trash cans where flies may breed.

• Use plug-in bug zappers or safe insecticidal sprays designed for indoor use to kill flying gnats on contact.

• Set traps with leftover beer or wine, as fruit flies are attracted to these smells and get trapped in narrow-neck bottles or containers.

• Sticky traps or yellow sticky cards can catch many flies when placed in problem areas.

These methods combined will effectively reduce and eliminate small flies in the kitchen environment. Regular cleaning and prevention are key to avoid reinfestation.