I've been parking my Q's outdoors for 10 years and never had this problem until this spring. Neighbors around the corner brought in about 50 bee hive boxes and set it up deep in their pasture away from homes. The problem with this is it's only about 100 yards from my house. For about the past 5 to 6 weeks the little buggards have been flying over my house on their way to a couple of large vineyards and orchards about a block away and leaving their droppings (AKA digestive juices, bee poop) on my Q. The pics show what it looks like after about 3 days and if I go a week without washing I can barely see out the windshield. I washed the Q one morning a couple of weeks ago and within an hour the droppings were covering my car. I know the solutions are pretty simple, i.e. car cover, park in the garage, park under a tree, so I'm just venting and not expecting any solutions from this post. I did park under a tree in the RV driveway and came out the next morning to find the car covered in bird droppings which are more of a nuisance and much harder to remove. The internet says this could continue for another few months or until all the flower blossoms are gone. The only good thing to come of this is my fruit trees are well pollinated and all of them will produce a bumper crop.
