bugs keep coming through our kitchen window

Question

The window works perfectly is in summer all the mosquitoes and flyes come inside, the screen does not have any holes, the glass is perfect the vinyl casement are properly fitted, but the moment we open the windows the insects come, is the in between the windows, I have looked for something in all the hardwares around, is there a way, to stop this

Paul · Accepted Answer

I'm not sure why that might be happening. May we see a couple photos of your windows in different views? That might give us a clue as to why these bugs are coming into your house.