I will on occasion use a clear plastic wrap called Road Wrap that I bought online. It is slightly sticky on one side and takes two people to get it on straight. I got the 24 inch rolls and slightly overlap them. The directions say not to leave it on over 7 days.
I am a big fan of a cleaner called Spray 9, which I buy at Ace Hardware. That spray and a love bug sponge will take them off better than anything else I have tried. The dryer sheets don't work for me. The new ones just leave a slimy mess on top of the dead love bugs. Dry ones don't work at all for me. May and September are the two bug months for them here in this part of south Florida. They seem to come out in swarms during the middle of the day. They are a real mess and nothing seems to eat them, not the birds, frogs, etc.
The love bug sponges feel somewhat abrasive but don't seem to cause any problems and they are made for cleaning off the nasty little bugs.
I bought the three pack of them.
http://lovebugeraser.com/This was about an hours accumulation while driving on the Florida Turnpike. Of course, I had neglected to put the Road Wrap on the front of the 5th wheel before going to Orlando.

