well, the way i teach the rules is to play the first round (till parastie alert usually) with open Cards, with and for everyone.
while playing i have the opportunity to explain the various Actions on the run and Point out how to infect, and how to defend. this also works great for pointing out common mistakes and misunderstandings.
i also explain that talking, communicating and lying are important parts of the game and noone should be shy to use this Tools of Teamwork, confusion and doubt. its allways a pleasure to see, when the Players start to understand what this game becomes when we start playing with hidden Cards.
after everyone has a grip on the rules i reset the game and we start to play.
Keep it up