Some areas seem to have a permanent haze of bugs.

Try landing at any Mississippi valley airport (Prairie du Chien comes
especially to mind) on a hot summer's evening.

You can practically hear the bugs on short final...

Which is why we use Lemon Pledge on the leading edges. The bugs just wipe
right off! ;-)
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"