I never like those tray tables. And I also hate to use the seat pocket in front of you. Most people put their trash in them. Airline travel is icky, but, a necessary evil.
When I came home from PIP I got a very bad case of Bronchitis. My Doctor said that it's critical when flying to keep your nose membranes moist. He suggested Vaseline or using a saline spray. I think the Zicam would be even better.