From past 13 years or so Ive purchased milk from Costco with no complains. But from from past 3 months milk have been curdling and going bad. Sometimes on the date of purchase when I brought the milk home and I thought I may have kept it in the car for too long. In February. In Wisconsin! Happened in 2% and whole milk. I tried increasing the coon was in the fridge - more than recommended. I do not like to waste good and this is making me very upset. Its a good waste and money wasted.