Unfortunately most of the videos are getting dated, and there have been several improvements.
First with most good cartos the little white rubber disk at the mouth piece end is no longer glued in, and can easily be removed. This IMHO solves a major problem. Placing that hot metal carto tube against your lips is lip cancer in the making. Throw that little disk away and use a drip tip.
Next there simply is no way to fill a carto without getting juice in the center hole. The old way was to just blow that juice out, and let it go to waste. WELL DON'T! Instead, without power give the carto several quick draws. This will draw that juice into the batting so that you can use it.
Thirdly, even tho' cartos don't have the problem as badly as atomizers, some leakage is bound to happen. Again, why let that juice go to waste, or live with the mess? Drip shields have evolved to where that is totally unnecessary.
First with most good cartos the little white rubber disk at the mouth piece end is no longer glued in, and can easily be removed. This IMHO solves a major problem. Placing that hot metal carto tube against your lips is lip cancer in the making. Throw that little disk away and use a drip tip.
Next there simply is no way to fill a carto without getting juice in the center hole. The old way was to just blow that juice out, and let it go to waste. WELL DON'T! Instead, without power give the carto several quick draws. This will draw that juice into the batting so that you can use it.
Thirdly, even tho' cartos don't have the problem as badly as atomizers, some leakage is bound to happen. Again, why let that juice go to waste, or live with the mess? Drip shields have evolved to where that is totally unnecessary.