Regular dishwashing liquid does not expire, as in go bad and won’t make bubbles and wash your dishes well, however as you have experienced it can separate over time. Shaking it should do the trick. Automatic dishwashing detergent however can become less effective over time.Click to see full answer. Correspondingly, how long does dishwasher detergent last? Dishwasher detergent: Lasts for 6-12 months, but can start to lose effectiveness around 6 months.Subsequently, question is, do laundry detergent pods go bad? Our PODS™ don’t expire, but they do have a shelf life of about 15 months. We suggest using them within 15 months to ensure they’re providing the best results. Similarly, does Cascade dishwasher detergent expire? The magazine says you can use these rules of thumb when it comes to deciding when cleaning supplies expire: Laundry detergent — six to 12 months. Dishwasher detergent — three months. Dish soap — 12 to 18 months.Can you use out of date dishwasher tablets?Almost everything (aside from dishwasher and laundry detergent) lasts up to two years, but check the packaging for a date or call the manufacturer, who should be able to tell you how old your product is based on the serial numbers stamped on the packaging.