One cause of liquid laundry packets not dissolving in the wash is improper use, like adding them to the washer after your clothes are in. You have a good reason for creating an issue with the packets because the film needs to be fully submerged in water. That's why knowing how to use Tide Pods properly can help. Your washing machine temperature may also be to blame. "If you are still having issues with dissolution, switch to warmer water during winter months or when water is especially cold," Zinna suggests.