We also wipe down all the surfaces on an airplane, including arm rests, remote, tray, etc. We never put anything in the seat pockets unless it's bagged (you don't even want to know what we've found in there in the past), and we have a rutine of wiping down everything in a room (hotel or cruise) when we first board -- phones, remote, light switches, counter surfaces, etc. More than once I have seen a hotel worker or room steward clean a counter surface with the same cloth they just used to clean the toilet (ugh). [We also bring paper cups and never use the glass ones and if the ice bucket doesn't have a bag, we use ziploc to get our ice]. Once we started these routines, it has kept us all well on all our trips.