You will come unstuck!
A big thank you to the TWD community. After my roommate and I double-teamed the mixer with a sad display of upper body strength, after mistakenly using hot water and a lighter (it works on jars!), and after pinning it in a corner with my feet and wrenching it with vein-popping gusto, I was mad.
Then I read your wonderful suggestions. I lubed up that mixer base and placed it in a frosty time-out.
After a 24-hr trial separation, it went back on the counter and we resumed our dance. Turns out I didn’t need a pair of man hands–with 2-3 tries and a rubber gripper, it was free! What a relief, seriously, thanks again!