It took a bit to figure things out. The charging port is very tight. I have to push the charger in VERY hard, until I hear a click. Also, the gaskets on the Mason Genie were very tight to begin with. It was extremely difficult for me to pull the genie off of the jar. Now, after numerous uses, it's loosened a bit so I can pull it off (though the gasket is still strong enough for a good seal.) Even with this learning curve, I love my Mason Genie. I use it everyday, saving lots of food that world ...