I have 3 box fans in my place. I rely on them daily for everything from drying my mattress pad, my workout clothes (in between workouts and after laundering), keeping cool while using my spin bike, and of course airing out the place on hot days. The one in the bedroom is a consumer grade Lasko. I prefer a lower speed, quieter one in there for summer sleeping.
The two in the living room are commercial grade Air Kings. They spin faster and move more air, great for those spin bike sessions and drying the mattress pad (on low speed, high is for 90+ weather). It's half cotton, half synth, so manufacturer says no heat. So I run it for an hour in the dryer with no heat, then in well under an hour on the couch with the fans on, it's dry.
Lately I've been draping my cycling jacket over the bedroom fan 4 days a week after my 2 mi walk/run route 4 days a week. I drape it upside down with it zipped just a few in, and it covers a little more than half the front of the fan. This billows the jacket and arms so it dries quickly on med speed. One day when I turned the fan off, it sounded like the motor needed lube.
I've had this fan several years, longer than the Air Kings, so I decided to clean and lube it. I've had cheap box fans before that can be cleaned and lubed without taking apart, but they aren't worth having. So I found this great video on YouTube by a guy
that does guide videos on cleaning and lubing fans. It's simple, yet informative, especially aligning the spindle and bearings.
I didn't go the extra mile and clean the switch, but that part is working fine (I also lack the contact cleaner spray). I use a product called Liberty Oil, which I've used before for lubing my PC fans. It's 100% synth and it can keep fans running WELL beyond their rated lifespan. I had to reorder some, as I couldn't remember where I put it after moving to the new place, or it could have been accidentally put in the give away/throw away pile for all I know. At first I thought the Lasko was like a Lakewood I had once with spindle visible from the back, but was kind of glad it is more robust. This job was easier and quicker than I thought it would be.