quick question everyone, been trying to get back into the bathmate side of training with more consistency seeing as I've not had much success so far. but I've watched the official how to vid on the site and it says flick the switch at the top to a closed position. however mine does not do this, i have to put my finger on it when filling it up and that's it? i have a Hercules x30 (the basic one,5-7inch)