touch screen freeze

on my ride yesterday, i got into some rain. My 1030+ screen froze and there was no way to get it "moving", even though the buttons kept on working. At home, the battery was at zero and that's when the screen turned finally off. After recharging, the touchscreen is not responding and it is not due to the screen-lock function!

Now that the device is 100% charged it starts up, just to show the mid-distance screen of yesterday's ride with the question, if I want to save it or not. Of course without the possibility to make it do either, since the touchscreen is still not responding.

What can I do?