I assume you have used a chemical cleaner on your windscreen (something more potent than screen fluid)?An old cause of noisey wipers was due to them becoming slightly bent over, due to being parked in the same place all the time. With the Yeti it is possible to have the wipers park in a slightly different position every other time (or close to it) each time you switch off, is this set on your car?
If you stop the wipers at the 12 O'clock position is the blade at 90 degrees to the glass?
if the wipers are clearing the glass without leaving streaks it is probably down to one of the above.