Do you rotate larger drivers to mitigate the effects of gravity? I'm my 40 years of playing bass in many bands, I did this on a regular basis as did the sound companies I worked with. I never blew a driver, unlike a lot of other bassist I knew.
Drivers and how to clean them: Notes from ScanSpeak
Please use good judgement but if you ever wondered what the actual manufacturers recommend for cleaning your speaker drivers here's one maker's view:
https://www.scan-speak.dk/technical/tech-notes/
https://www.scan-speak.dk/technical/tech-notes/