We leave the back door open in warm weather, but get a lot of flies in the kitchen.
So please recommend the best thing to hang at the door to stop them getting in. The only problems are a) my husband maintains we can't attach anything to the wall, so it needs to be easy to hang! and b) we have a cat flap, so the net blinds that attach by Velcro won't work.
Lastly I'm on a very tight budget.
Thanks.