Filter needed a wash, and it needs to dry before oiling. So a little airflow from an exhaust fan, little heat from an AC exhaust.
And in less than an hour, a dry filter. Way better than just letting it sit for a day or two, especially in humid places.
Well you do need to throw the original airbox out to install this one!
They do make replace my filters for most vehicles, not just for cold air intakes.