What would happen if flies became extinct?

It's not as hypothetical or silly a question as some of the other answers seem to presume. Humans are close to having sufficient command of genetic technology to erase a species from the Earth. We will do this for species that are sufficiently annoying. Mosquitoes? On

How to get rid of flying insects in your house

You need one of these or something similar.

How to prevent little black flies getting inside my house

It sounds like these insects are No-See-Ums. These insects bite and seek out a blood meal to fuel the production of eggs. They seek you out based on your respiration, smell and heat signature.There are a number of ways to block them from