Do a search on here,you'll find quite a few posts about Rain-X Washer fluid gumming up the sensor and the nozzles.It's fairly common knowledge on here that Rain-X washer fluid causes issues,the de-icer version you're using might be okay,but the washer fluid versions don't have a great rep in Chryco products.They have a few varieties of fluids.
www.rainx.com
Now that I'm getting old and stupid, sometimes I forget the past and buy some more Rain X when I see it in the store. I have had some Chrysler products that this has never happened too, but I do recall more than one of my Chevy trucks that this Rain X would gum up the pump/sensor.