Microwaving formula

Vicky • 28 yrs old - Dog lover - Eats everything
Let's get real...is microwaving formula really harmful for baby? I mean, I warm baby's formula 2 to 3 times in five second intervals. It still ends up a little bit on the cold side every time I test it. I'm wondering if the microwave will kill the probiotics or whatever is in the formula only if I warm it to scalding hot. Thoughts?