Travelers soaked in sweat could find themselves flagged at airport security, according to USA TODAY.
Millimeter wave body scanners used by the TSA can mistakenly detect sweat stains as anomalies due to moisture altering clothing density. These false alarms often lead to additional pat-down screenings, though they’re routine and usually brief.
Experts say the issue is common in hot climates or for people who perspire heavily. While frustrating, the alarms aren’t dangerous — and passengers can request private screenings if needed. TSA confirms moisture is among several factors that can set off the machines.
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