Fruit fly TRAP!!! I could have used this after going camping for 10 days and leaving bananas on the counter accidently with a pan of water soaking in the sink (great breeding location)... yowza, there must have been hundreds of them!
Put two caps full of vanilla extract in a coffee cup, then place it in the oven at 300 degrees for one hour. Within twenty minutes the whole house smells like Heaven. Its actually a common realtor trick. Yum!!