Hey guys I am new to vaping, I have some knowledge on it but I have an issue with my vct pro tank (by smok) The problem is I have no clue how to take it apart/refill it. I have watched youtube videos and they hold the top of the tank then unscrew the bottom but they doesn't seem to work i've tried to put juice through the mouth piece and it just seems to go through and drips out of the air holes can someone please help me