Garmin crashed

Today, after a wet ride, my Garmin 820 Edge froze, showing an unchanging display and unresponsive to any of the buttons.
Can I take the back off to let it dry and pull the battery to re-start it?
Can I take the back off to let it dry and pull the battery to re-start it?
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https://www8.garmin.com/manuals/webhelp/edgeexplore820/EN-US/GUID-46A06A7C-1F46-4DBA-B010-DAD7BA6BE59E.html
Press and hold doesn't work, pressing and holding everything doesn't work, it's just unresponsive.
RFTM.... Garmin suggest plugging in and holding down the power button. It worked
good that the hard re-set worked. I found with my 1000 that when the internal memory was full it started to crash/freeze every ride which led to a factory reset. I now make sure I periodically clear data off the internal memory.