WESTBY, WI (Ben Caxton) — Westby Cooperative Creamery says they now have sour cream that doesn’t sour for up to 90 days. That’s about 15 days longer than they thought would ever be possible. The new formula and production methods that make it possible now mean that the shelf life of Westby’s sour cream, lite sour cream, and French onion dip are longer than ever. Jason Levendoski, Westby Cooperative Creamery quality manager, said he and his team had been watching the Creamery’s retention lots for two years. Retention lots represent a portion of every batch of product made and are kept for future investigation should a customer complaint or concern arise. The team noticed that with the investment in new air handling equipment to reduce humidity during production along with a switch to Clean-In-Place sanitation practices, the retain lots were lasting longer and longer. By reducing humidity in the room where these products are made, the Creamery greatly reduced the probability of mold growth according to Levendoski. the company says that the extension is a big deal because it gives retailers longer to sell the products in good condition to customers.