I remember seeing something on the TV news a couple weeks back regarding a new repellent which disrupted the mosquitoes sensors/nerves &, therefore, their ability to function. I was only half-paying attention but it seems to me it involved an extract from yellow pine trees (or some kind of relatively common fruit). Not only did this stuff keep skeeters away, it made them fly upside down, fall to the ground, and do the funky chicken while lying on their backs. Eventually they literally shook themselves to death. The short documentary did the old bare-arm-in-the-aquarium-full-of-skeeters test. First, the volunteer sticks his untreated arm in & hundreds of the little bastards try to exsanguinate the guy. Next, the volunteer inserts his treated arm and, seconds later, the little vampires are all flying upside down, drunk & disorderly-like, smacking into glass walls, & eventually shuddering themselves to death doing the funky chicken on the aquarium floor, while staring up at their missed meal... that guy's arm, which has zippo skeeters on it.
Anyway, this stuff applies quickly, doesn't smell, is not sticky, and lasts a long time. It doesn't just keep skeeters away; it kills them. I remember they said it would be 3-4 years before they could go commercial with it.
The volunteer apparently loved the stuff. He has also indicated his Friday night poker play improved significantly when that new sixth finger fully matured on his dealing hand....
Jimbo