A bottom-loaded tank is a tank where the atomizer coil sits at the bottom base. Gravity helps the liquid get to the coil and wick at the bottom. On the other hand, top-loaded tanks have the atomizer coil at the top of the tank and typically has a wick that can be seen inside the tank leading down to the bottom.
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To keep the freshest taste in your tank, you’ll need to change your atomizer coil after an average of 2 weeks/500 puffs depending on how often you’re vaping. It’s as simple as unscrewing the coil from the base, and then replacing it with a new one. Just remember not to over tighten anything that requires it to be screwed onto other pieces.
https//youtu.be/zL8toDVh55U