I don't think GP's attitude was stupid, though I do think your response was (sorry). For those of us who have always known planes are filthy and not wiped down

I don't think GP's attitude was stupid, though I do think your response was (sorry). For those of us who have always known planes are filthy and not wiped down, we carry a sanitizing wet wipe. Btw it's not just low cost carriers, the dirtiest planes I've found are the larger carriers. Your health is your responsibility foremost. Later in life you'll find noone else is looking out for you more than you. TLDR: sanitize key objects before touching or your hands after if you're that concerned. TV remotes in hotels, trays in planes, after touching gas pumps etc.