In Florida, cockroach allergens stick around year-round—even after the roaches...

https://touch-wiki.win/index.php/Why_Is_Moisture_the_Biggest_Variable_for_Roaches_in_Florida%3F

In Florida, cockroach allergens stick around year-round—even after the roaches are gone—and can worsen asthma symptoms. These tiny particles hide in places like behind the fridge or under mulch