For a more comprehensive reset, go to Settings > Apps, select the glitchy program from the list, and tap Clear cache. The next time the app loads, it will have to refresh its data, which should erase the corrupted bits. If this doesn't do the trick, tap Clear data on the same screen as the Clear cache option. This erases all stored information, resetting the app to the state when you first installed it. That means you'll have to log back and reconfigure your settings. Still, the hassle is worth it if this step fixes the problem.