Originally posted by miamijim
I get mine in streaks.
So do I. I had around five in two days on tour last year, then none for around 10,000km (despite living in the broken glass capital of Australia). Then I got three in the space of 1km (which were the first of seven in a month), and none in three months (probably around 5,000km) since. I have no idea why it happens this way. I just prepare for it as best I can.