- Make sure that you grease the insides of the jars well.
- After filling the jar 1/2 full with batter, wipe the rims REALLY well.
- Wipe the rims again immediately after removing the jar from the oven.
- Immediately place the lid and screw on the ring after wiping the rim.
- Downside: These do not keep like regular canned foods. I will be freezing them until it's time to hand them out. They're only good out for about a week in a jar.