I do the top fill method and hold my thumb on the air hole. Screw top back on till it just holds, turn upside down and screw it on tightly. Release thumb from hole and you should see a bubble or two when right side up.
If juice is leaking from the air hole, clean it with some paper towel and tap the hole 10-12 times as if you're pushing air through it into the tank. Take a dry pull or two and should not leak after that as long as the top is well secured.
This is how I do it.
Question: how far up do you fill? All the way up the threads? Or to just where they start?
Thanks in advance