All it takes is a little water on a hot windsheild to crack it.

I cracked mine on the roadster just trying to clean it on a cool day. Pressue of my hand trying to clear the haze from one year sitting on a gravel lot in Georgia before I bought it. Scrubbed it for two hours and got it bright.

Next day driving in town, spontaneous crack as I drove.

Weeks later, My wife's SRT needed a wash. 95 Degree F bright sunlight. A little splash of hose water and Zip, a horizontal across the top of the entire windshield.

Defect? I don't know. Insurance covered them both.