I have noticed that some riders do not take an extra 10 seconds to wipe off their tires after going through glass. This takes a little practice especially for the rear tire. It's a real "bummer" when your feeling great on the bike and having a flat as you all know too well. Also after washing your machine check the tires for embeded glass that can eventually work it's way to the tube. A sharp tool like an awl or large needle works great. I average 2-3 flats every year riding 5,000 miles.