Intermittent Touchscreen deadspots

[Daz-Mataz]

Often if my Astro has been on for a while without a restart, areas of the touchscreen gain black spots. Currently it's over the G-H area of the onscreen keyboard when I hold the device in a portrait orientation. I find that either opening the device to display the physical keyboard works to fix the issue sometimes, but a restart of the device fixes it everytime.