I'd hook a small hose to a shop vac 1st, then I would turn it on it's side or upside down & strategically spray with an aerosol cleaner/oil with hose, as not to push it towards any bearings. You could vac. while spraying too
I wouldn't slosh anything around in there 'till you know it's as clean as you can get 1st
Last time I did something like this I threw some premix in the bottom end, sloshed it around and dumped it in a 5 gallon pale 7 or 10 times. I could see all the dirt come out and settle in the bottom of the pale. Turn the crank and see if there’s any little specs holding on to the webs, Worked fine for me.