The wick's only true purpose is for cartridges. Period. While it may hold some juice for drippers, it also holds flavors. Meaning I can't easily blow out an atomizer and try a different juice. The wick will hold onto the flavor of whatever it absorbed. I don't have the time or energy to boil an atomizer when I want to switch up flavors, nor do I wish to carry multiple attys on me ever (unless I'm traveling). W/o a wick, I can blow out and atty and I'm good to go.
As for the leaking, if you are filling an atty to the point it leaks, you are overfilling. The wick isn't holding that much juice. If you have removed the bridge, then sure, an atty will be more prone to leakage. The wick in and of itself is not going to keep an atty from leaking, or have a significant impact on it.
The entire purpose of dripping is to optimize flavor and keep from having to deal with messy and inefficient carts. The entire point is that you put in a few drips, take a few puffs, and put in a few more drips. You should not be filling to the point where the atty leaks, nor should you be expecting the atty to "hold more juice". That's what cartomizers or carts are for.
For a juice-fed device, such as FreeFlow rocks, the wick is absolutely not necessary, as the juice is fed from the bottom, rendering the wick nearly useless.
People also should not be vaping carts until their dry... but they do. All I'm saying is that with a wick there is more room for human error in regards to overfilling. In my experience an atty with a wick will hold more juice than an atty without one. The wick holds juice. Therefore if there is a wick it will hold more juice than if there is not a wick.
Yes, atomizer wicks were made to wick the juice from a cartridge. That does not mean that can serve a purpose for dripping as well. I do agree that its easier to test different flavors without a wick though. Thats the only reason why I usually have 1 atty without a bridge or a wick. If I had a juice fed unit I would de-wick and de-bridge though.
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