Re: 2016 Wrangler Defroster
If the build-up is inside, do you have the A/C 'on'? That is what is used to dry (dehumidify) the air that's blown on the windshield.
If the build-up is outside, do you have the temp set high enough? That is what is needed to heat the windshield so that water vapor doesn't condense on it.
● 2014 Wrangler Unlimited Rubicon X
● 1987 Wrangler Laredo
● 1999 Cherokee Limited (Up Country,Trailer Tow)