Are you trying to vacuum moist items, for example frozen meat or fish? Try to put the meat or fish in a bag, then take a paper town and fold it in half. Place the folded paper towel in the bag in between the item and the point of the bag that will be sealed. Place the open end of the bag in the vacuum channel, close the lid and start the vacuum packing process. The paper towel traps excess liquid and does not affect the taste of food. If the unit seals properly, you should be able to vacuum pack and seal bags. You can also slightly pre-freeze meat or fish for 15-30 minutes to eliminate some of the juices. While examining the equipment, check the seal for any cracks, dents or food particles. Clean the seal by wiping it with a sponge or soft cloth. A clean seal guarantees perfect sealing. If the above troubleshooting techniques do not work, contact an authorised Service Centre.