A FloridaGal I work with took a minute to catch on to the manuals too. I let her borrow a PV, I told her to press the button. She pressed the button, then released it before trying to take a draw ... and she got nothing. It seems she thought you just press the button to turn it on, LOL.
IowaGal, manuals are so much better, you might as well
buy them exclusively from here on out. Then, you'll get used to it. Hit the button a second or so before you want to take a draw (and hold it, heh).
It's not a cigarettte.