I have always hand washed his bottles, they are fully cleaned & rinsed by me so that's not the problem.
I have always used the Nestle Goodstart from day one & he was always fine with it from what I could see. I just figured before he started on solids his poop was supposed to be green & not solid because that's what I've read.
So if I end up switching him to milk at age one should he have this reaction to whole milk? It's not stinky, just green & mushy, I wouldn't call it diarrhea, just really loose. I have been practising with whole milk in a sippy cup since he's not good at the sippy just to get him used to the taste of milk & I am hoping that we can eliminate bottles anyways since right now I'm lucky to get one bottle of formula into him during the day.