I know this must have been asked over and over, but I have looked around trying to find the answer and can't. Can someone please explain to me "topping off". Everyone here says it, and I know it seems ridiculous to you to not know, but while they "say" it, no one "explains it." Does this mean taking the cap off the carto and adding juice.....or do you put it in the battery end and hope it doesn't soak back through the battery? Sorry to be so stupid, but I don't see it anywhere on these threads.....thanks for an answer.
