For the past 12 years I have used cold pressed Neem to repel all types of bugs. You can get it in other forms too now, e.g. shampoo, sprays etc. It is natural, smells like gravy and is fabulous! It is excellent for keeping flies away from minor cuts and for treating sweetich. If you use it before the midgies bit you will eliminate sweetich. It is the only fly repellent I use and it does all the jobs in one. I cannot recommend it enough. Give it a try - you won't be disappointed. I always buy it in the cold pressed natural form. You keep it in the fridge and it stays hard like a wax. Once you put it on your fingers the heat turns it to liquid.
Eeyore.