This is my first experience using an action camera with a touch screen. My previous camera was an SJ4000. Using the touch screen without the waterproof case works pretty well. However, when using the touch screen with the touchscreen compatible waterproof back door, the screen is really difficult to use. It seems like there is a small amount of dead space between the back door and the actual touch screen, so you have to press hard enough to "flex" the back door to make contact with the screen. Which makes it difficult to touch where you want on the screen. Dragging is virtually impossible. I've never used any other touch screen action cameras, so i'm not sure if this is the way they all are, or if there is something wrong here. Any comments and advice are appreciated. Thanks!