Today my iPad ran out if storage space. I checked the usage page in Settings and Goodnotes was taking up 4GB of space. A few minutes later the iPad automagically launched into "cleaning" mode for Goodnotes and then, voila, the app's usage had dropped to 65MB. I create a lot of big files in Goodnotes but regularly clean them out when I'm done. It would be great if I could manually trigger a cleaning of the app's cache so that it doesn't grow to several GB again.