Examine seal of bag. A wrinkle along the seal may cause leakage and allow air to enter. Simply cut bag and reseal. Sometimes moisture or food material (such as juices, grease, crumbs, powders, etc.) along seal prevents bag from sealing properly. Cut bag open, wipe top inside of bag and reseal. See pages 2-3 for guidelines for specific foods. If you are vacuum packaging sharp food items, bag may have been punctured. Use a new bag if there is a hole. Cover sharp food items with a soft cushioning material and reseal. If you are still experiencing difficulty with air in your bag, fermentation or the release of natural gases from inside the foods may have occurred. When this happens, food may have begun to spoil and should be discarded.