Reheating breastmilk?

Kristina

I’m starting to use some of my freezer stash of breastmilk, my issue is my baby is super fussy with the temperature of his milk and I always have to reheat the bottle at least once through a feeding or he won’t take it, is it safe to reheat and also if he doesn’t finish it all is it safe to keep in the fridge and reheat again? If not can someone please tell me how you make it work for you