Stopping Apple Watch Workout when wet Frequently I cannot stop the timer for a run in the Workout app if I am too sweaty - the touch screen does not recognize my finger press, and neither the side button or Digital Crown help. 

Is there a combination of buttons or maybe even gestures that can be used to stop the timer?
First, pause the workout by pressing the crown and side button at the same time (here's an example taken from a swimming workout).



This will pause the workout until you can dry your fingers.  An unfortunate side-effect of pressing these buttons will be that a screenshot will be taken if you also turned on the feature to take a screenshot when these buttons are pressed.

After your fingers are dry, you can end the workout in the normal manner by swiping to the right and tapping End.