Mosquito Door Guard

If your in an area with mosquitoes you probably don't like them.
In case you haven't seen the commercials, apparently there is some new type of mosquito repellent that you don't spray on. You just clip it on (Link: http://www.off.com/clip-on-mosquito-repellent/).

I haven't tried it yet, but it seems like a pretty good idea if it works. But what about when your not spending a significant amount of time outside? What about when you run out real quick to grab something from the car? Even if you don't get bitten there is a bigger problem. It seems like no matter how short the time, mosquitoes fly in while your door is open. The only thing more annoying that being bitten while outside your house is being bitten while inside your house.

It seems someone could retrofit those OFF clip on spray things such that they could be mounted above a door. A motion sensor would trigger it whenever the door is being used. The idea would be to create a screen of repellent across the door. Perhaps you would still be bitten while outside, but at least they wouldn't get inside.

I suppose it could even be designed to 'mist' repellent on people on their way out the door. This way you wouldn't get bitten if you didn't think about putting on repellent. The mist likely wouldn't be too good of a covering so it would only be helpful for quick trips in and out. I'm not as sure about this feature though, because its not necessarily pleasant being covered in bug repellent (which is I assume part of the reason off is making clip on repellents).

Even if the mister feature where not to be implemented, I still think the basic idea would be pretty nifty. I hate seeing that I have let mosquitoes into the house when I open the door and humans need a little extra defense.