Q: How do I shut down apps to keep from running battery down?

Double-click the Home button, in the resulting menu tap and hold the app until it starts to wiggle then tap the red minus symbol that appears.

Most apps don't actually run in the background and therefore do not use any system resources.

Read here > http://support.apple.com/kb/HT4211

since upgrading to iOS 7, the apps don't wiggle on my phone!    Can you help me solve this problem?

Sorry - found the answer by looking properly!