has GOT to be old formula!! times a million!!!!!!!!!
I usually try to at least rinse the bottles soon after we use them. But I forgot one in DS's diaper bag, and I swear....the stuff turns to rancid sludge!!! Makes me wonder what the heck I'm feeding this poor child!
Re: The NASTIEST thing in the whole world......
One time last summer we took our vehicle to the mechanic. It took like a month to get back. We discovered we had left one of Teagan's sippy cups in the car and it leaked. OMFG I damn near puked.
I always rinse the bottles as soon as I put them in the sink otherwise they never seem to get very clean in the dishwasher. It's like the formula sticks to the sides. Weird.