They can be a bit squirrelly to get in there sometimes.
We have a nice Carrier unit (before they exported manufacturing to Mexico) but have a reusable filter, just hose it off outside to clear it. However, it's not able to filter allergens to any extent, and my wife is bothered quite a bit in the springtime. So I ordered a pack of filters meant to do a better job of that, but with the tradeoff that I'd have to change them out and dispose quite a bit more frequently. All of a sudden the things sold out everywhere (COVID? China trade war) and Lowes killed my order without explanation.
Anyway, this has little to do with your post but I just wanted to vent to someone.
Airfiltersdelivered.com- a necessity for me thanks to a size no one stocks