Logbook History

I received my Observer a few days ago. I am having trouble clearing the altitude Logbook History. I follow the instructions on page 24 of the manual and select yes and then press the mode button. But the same data remains when I reenter the history screen.

	Suunto Observer - Click for more info The shock-resistant Suunto Observer is a tool built for outdoor challenges, but its timeless design makes it wearable in any situation. The Observer is 1/3 smaller in both diameter and width than the first generation Suunto Watches (Vector, Altimax, etc). It also features a chronograph, which previously was only offered in the Navitech but is now discontinued.