Pour ½ cup of apple cider vinegar into a small jar or bowl.
Stir in 1 teaspoon of sugar to make the trap more attractive.
Add 1 drop of dish soap to break surface tension so gnats sink.
Cover the jar with plastic wrap and secure it with a rubber band.
Poke 5–6 small holes in the wrap with a toothpick.
Place the trap near sinks, fruit bowls, or houseplants.
Refresh the mixture every 24–48 hours until gnats disappear.