I am having trouble with my expressed milk spoiling quickly all of a sudden. I have almost 1 year old triplets and in the last several weeks, my milk is spoiling a lot quicker. I tried making sure everything was sterilized and then I decided to get some new pumping supplies. that seemed to help until tonight.
Each of their bottles was sour.
Any ideas on what could be going wrong? I started pumping into plastic storage bags, since they are sterile. Could I be heating it too much? Could it be curdling? Is there something wrong with ME?
Any advice would be great!