I never have with my Conforti Shark chip -- since 1999. I always make sure my oil is changed and the car has been at freeway speeds for at least 20 minutes before I head in first thing in the morning. And, I don't turn it off if there is a short wait. I also run a container of RXP through a tankful before that time of year.
I am always really close to going over on low-speed HC, but that's about it.