I find that with these, it is best to stick a carto condom on the battery connecter end before filling or topping off.
When that little black plug is released, the vacuum built up in the tank lets go, and the juice follows gravity as best it can.
Even with this method, once your all done, and take the carto condom off (after replacing the black plug!) you will probably get a drop or so come out the airholes at the bottom as it all settles, but once that is wiped away, it doesn't leak any further.
I also like to give them a little blow into the mouth piece after filling, with the battery end in a paper towel, this helps clear the air tube of any juice that may have made its way up there during the filling process.
If you blow to much though, you can end up forcing additional liquid out then is necessary.
When that little black plug is released, the vacuum built up in the tank lets go, and the juice follows gravity as best it can.
Even with this method, once your all done, and take the carto condom off (after replacing the black plug!) you will probably get a drop or so come out the airholes at the bottom as it all settles, but once that is wiped away, it doesn't leak any further.
I also like to give them a little blow into the mouth piece after filling, with the battery end in a paper towel, this helps clear the air tube of any juice that may have made its way up there during the filling process.
If you blow to much though, you can end up forcing additional liquid out then is necessary.
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