I've written in the past on how nasty those airline tray tables can be and how you should bring your own disinfectant or wipes to clean these before use. To prove my point, I recently snapped this photo of a guy (idiot) on a flight down to Los Angeles with his shoes off and right foot laying atop on the tray table. (Sorry it's a bit blurry - but clearly I was going undercover for this investigative reporting) =) Seriously folks, I've seen far worse than this. For your own health, wipe down your travel table before using it.