How to Clear UITabBar badgeValue

It's delightfully easy to add a badgeValue into a UITabBarItem, but I couldn't find how to remove it. Turned out it's as easy as adding one:

if (count)
    self.parentViewController.tabBarItem.badgeValue = @"!";
else
    self.parentViewController.tabBarItem.badgeValue = nil;

Thanx Apple for these delightful surprises!