Recently, my ipad1 has been crashing a lot. Usually it crashes from an app and returns to the main screen. It isn't exclusive to one app. Sometimes it's when I use text on sketchbook pro, use GarageBand or play Drawsomething Sometimes it's from safari or Facebook. I paid for 64 G and haven't used it all up, so wouldn't have thought it's a memory issue. Can I do anything?