You might want to just ditch the thermometer… don’t worry about the actual number, and just try to feel your way through this.
Are your hands and feet comfortably warm?
How about after a fatty meal?
Better/worse after a salty meal?
Maybe you don’t need to refeed anymore, and can taper off the calorie content, but pay more attention to the type of food? See if you can experiment and find out which nutrient (sugar/ salt/ starch/ fat/ carb/ protein or a mix) is what makes you feel best – energy/ mood/ temperature, etc.
Not sure what all you’ve tried – other than everything – so, just trying to throw some thoughts out there. Pretty much what Linda, said, too… see if you can hone in on ‘hearing’ your body’s signals.