In reply to ow arm:
I used to use 100% DEET (for example, Ben's 100) for a decade or so to prevent mosquitoes and midges (when I moved to the UK) in quite few countries. However, it is rather harsh material to put on your skin and can leave some marks on your garments. So I moved to Smidge and I am quite happy so far (tried it only several times so far - I have been lucky this summer). It smells better, too.
Extra Tip: It looks like it's a bad idea to go outside naked in the middle of the evening/night. I realized that too late...