I tried them and got a chemical burn from the patch for my trouble. No midge bites but the burn took six weeks to disappear.
Neat wee square with rounded corners.
I still have the rest of the packet unopened if anyone wants to barter.
Might put that into Swap Shop
cheers,
M
p.s. Okay Tenderfoot, so my punctuation ought to have been sharper
I was bitten on my face, by midgies, while walking down the woodland path, that runs along side my back garden. 
M
Neat wee square with rounded corners.
I still have the rest of the packet unopened if anyone wants to barter.
Might put that into Swap Shop

cheers,
M
p.s. Okay Tenderfoot, so my punctuation ought to have been sharper


M