2015 Nissan Altima wipers, windshield & visibility problems

The windshield cracked for no good reason. Took it to the dealer where they run a pen down the seam and claim that there's an impact. I'm an engineer and I can attest stress fracture on a glass doesn't guarantee that there's no chip on the edge along the way. This look like a stress fracture, or workmanship defect. NHTSA, please investigate this can lead into serious accident if it happens while driving in highway.

Washer solvent wal-mart brand bug remover type added to washer tank, within two weeks washer system plugged and it was found that black slime (mold) was in the tank. Washer solvent bottle made by splash products also had black mold like slime in it. Reported to the store and corporate was advised and no one from the manufacturer has contacted the customer to resolve this. Corporate noted that another complaint appeared of the same problem in another state.