In reply to lithos:
Interesting article. I'd be interested to see something like this in the shops.
My current favourite is Smidge. I find it just about as effective as DEET based products but without all stinging of the eyes, numbing of the lips and melting plastics.
Still we can pretty much put the repellents away until next year. Here on the NW coast of Scotland there are a few midges, but very few and they don't seem to have their usual oomph. Perhaps they didn't recover well from the hot and dry spell in May - early July.
Dave