i can't say that i'm a fan. with my kids running in and out of the house a thousand times a day, they are inevitably going to make it indoors. fruit flies or gnats (as we called them in cali) are literally everywhere.
here is a simple solution to kill the fruit flies that make it into your house. these ingredients are natural so you don't have to worry about little hands getting into things they shouldn't.
first, make sure the fruit in your house is either kept in the refrigerator or is completely covered. covering your fruit may work to keep fruit flies out of the fruit but they are crafty little devils and will manage to find a way. we keep our bananas in the microwave and try to keep all other fruit in the fridge. that has helped to keep some of the fruit flies away. also, as tempting as it is, avoid leaving the doors or windows open with just a screen in place. fruit flies can go right through a screen and will invade your whole house.
once there are fruit flies in your house, here is the way to attract them and kill them.
pour about 3/4 cup of apple cider vinegar into a bowl. add about one teaspoon of dish soap (i love mrs. meyer's dish soap and method dish soap because they use natural ingredients. they work perfectly for this). avoid using too much dish soap as the bugs will not be as attracted to the smell and it won't work as well. here is the result...only three flies dead in about an hour.
with just the right amount of dish soap, you will have scores of flies dead in less than an hour. it is amazing. dump out your dirty, bug filled vinegar every day and keep repeating until you are bug free. it works like magic. enjoy a bug free summer!