Cockroach allergens can stick around long after the roaches have left, posing a...

https://mega-wiki.win/index.php/Why_Do_Palmetto_Bugs_Show_Up_After_Heavy_Rain%3F

Cockroach allergens can stick around long after the roaches have left, posing a real problem for folks with asthma here in Florida. These tiny particles can trigger symptoms year-round, not just when you see a bug