She’s serving up airplane doos and don’t’s.

Baby poop particles are the undetectable, undesirable condiments likely contaminating those pretzels, cookies and in-flight bites frequent flyers eat from their tray tables at 30,000 feet, cautions a cabin crew pro.

“People change their kids diapers on those tray tables on airplanes; that’s why, as a flight attendant, I don’t ever eat off of those tray tables, I don’t put any of my stuff on those tray tables,” warned Janae, a mile-high staffer, in a stomach-churning vid.

“If I have to, I take a trash bag and lay it over [the surface], because even wiping it down with Lysol wipes,” she continued, “the…

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