One house that I cleaned recently had a fruit fly problem from the owner leaving cans of cat food out after emptying most of the contents for his pets. I thought about picking up some of the sticky tubes you can buy at the store to catch them, but that is really tacky and doesn’t look professional by any means.
I planned on going with an old trick with a glass jar, fruit, and vinegar, but found that a lot of people had bad results. After a little searching I came across a lady who added her own spin to it with a lot less required. Check out the video below to see how I used a simple plastic container and a piece of fruit to catch the flies.