After a few rounds of taking the feeder in and hitting with a blow dryer as the nectar started to freeze, I strapped a USB hand warmer to the bottom and it works like a champ!
OCOOPA Fast-Charging Hand...
https://www.amazon.com/dp/B08GQ34XWW?ref=ppx_pop_mob_ap_share
They even use USB-C fast charging, which is AWESOME!