What's the best defence against midges?

I don’t understand why they go for some people, not others – and how I can stop the itchingEvery week a Guardian Money reader submits a question, and it’s up to you to help him or her out – a selection of the best answers will appear in next Saturday’s paper.I was in the Lake District last weekend and got bitten to pieces by midges. Why do they go for some people (like me) and not others (like my partner)? What’s the best defence against them, and what’s