We used to live in Argyll (Tighnabruaich) and I'm sure the mother of all midges lives there. The only thing which gave us some relief when we wanted to be outside was Avon's Skin-so-Soft oil. The midges still landed but they didn't bite. All the men who worked outside used it.
After several years of the dreaded things we'd had enough and left. I really do miss Scotland, but the thought of the midges keeps me focused. Where we live now has mountains, lakes and bracken - but no midges. Heaven.... 
The people who bought our house use midge machines - one at the front and one at the back. They attract the midges and leave the house and its occupants alone. I believe they paid quite a bit for the machines but they work.