Bull! None of that works!
The itching burning will stop eventually on its own, but I have tried EVERYTHING I can think of or find info on, to keep from experiencing it in the first place, and nothing I've tried prevents them from doing their thing. I have been covered in oil and grease, bug spray, deet, ect....and STILL it hasn't stopped them. Once they are on you, you're screwed for 2-4 hours it seems. All it takes is 3 steps into the wrong spot and you're in for it.
They must immediately crawl/dive into your pores or something.