New Delhi, April 18 -- A content creator, @HowDirtyIs, tested the cleanliness of a Southwest Airlines flight. He swabbed areas like the tray table and armrest. Lab results revealed the plane was far dirtier than airport seats, including those at NYC's La Guardia.

While the airport chairs had minimal "skin bugs", the flight surfaces were found to be shockingly unhygienic, the New York Post reported.

The investigation revealed alarming levels of bacteria on aeroplane seats and surroundings. The dirtiest spots included armrests, tray tables, window shades and even safety manuals.

The investigator advised wearing long sleeves to protect your skin. A flight attendant also supported the tip. The findings sparked disgust online, with one trav...