That sounds like the perfect recipe for a classic, homemade insect trap! It usually comes down to a clever combination of things you already have in your kitchen—like apple cider vinegar, dish soap, or a ripe banana peel.

Since you didn’t specify the method, I’m guessing it’s the absolute classic against fruit flies and fungus gnats:

The Vinegar and Dish Soap Trap

The bait: Pour some apple cider vinegar (or fruit juice) into a small glass. This magically attracts the insects.

The trick: Add one or two drops of regular dish soap.

Why it works: The dish soap breaks the surface tension of the liquid. As soon as a fly lands to drink, it can no longer stay afloat and sinks.

If you’re targeting larger flies or mosquitoes, you can often make a funnel trap from an old plastic bottle (cut off the top, turn it upside down like a funnel, and insert it back in) and fill it with sugar water and a little yeast.

What specific method or “secret tip” did you have in mind?