In Florida, cockroach allergens can linger long after the roaches are gone,...

https://yenkee-wiki.win/index.php/How_Long_Does_It_Take_for_Roach_Allergen_Levels_to_Go_Down%3F

In Florida, cockroach allergens can linger long after the roaches are gone, making asthma symptoms worse for many families. These tiny particles hide in cracks and corners, especially in humid areas