Week 3-Stop being sarcastic

I recently completed a parenting class at my church since I am the proud owner of a 13 year old daughter (just this week!). This class confirmed that while we have done many things well, I can still improve on how I communicate with my new teenager.
Sadly, I was informed sarcasm doesn't work. It can be misconstrued as a serious comment and can backfire on you. Unfortunately, I use sarcasm liberally so...this will be another hard lesson in creating a better Diana. I guess this week will also need to make use of last week's goal to listen more, talk less.
I am sensing a theme here...