Whether you like it or not, every single app you open on your Apple mobile device stays open in the background – using very little, but very precious system resources.
Here’s how to view/close running apps:
– With the device unlocked, double-tap on the Home button
– Tap and hold on any of the apps shown in the bottom row until they shake
– Tap the red “-“ icons to close any running apps
Bonus tip: After double-tapping, swipe your finger to the right for quick access to your iPod controls.
p.s. If this tip didn’t work for you, then connect your device to iTunes and update it because you are running an outdated version of the Apple iOS.