My granddaughter recently drew my attention to the fact that I always seem to have a long list of recently-used apps displayed on my Galaxy S5 when I touch the virtual button that's to the left of the real button at the bottom of the screen, even after I've powered-down my phone and then re-started it. I checked with my Samsung tablet, and the list there seems to get deleted when I power down, for there's only ever a couple of apps showing. I can't find any option on my phone menus to delete this history, so I have to resort to tapping the "X" symbol on each one in turn to get rid of them. So, a couple of questions: Are the apps in the list still working in the background, hogging memory and using battery? How can I configure my phone so that the list is deleted when I power down? My phone is running Android 5.0.