In Florida, cockroach allergens can stick around all year, even after the bugs...

https://goodmenproject.com/everyday-life-2/florida-homes-have-a-year-round-asthma-trigger-the-rest-of-the-country-only-gets-in-summer/

In Florida, cockroach allergens can stick around all year, even after the bugs are gone, making asthma symptoms worse for many. These tiny particles settle in hidden spots like behind the fridge or under sinks