Cockroach allergens can stick around long after the bugs are gone, and for many...

https://extra-wiki.win/index.php/Can_Roach_Allergen_Still_Be_There_After_the_Infestation_Is_Gone%3F

Cockroach allergens can stick around long after the bugs are gone, and for many Florida homes, that means year-round trouble—especially for those with asthma. These tiny particles can trigger symptoms without you even realizing it