My wife bought a new Fiat Panda in November 2008. In November 2009, it was apparent that water was leaking into the car and soaking the passenger side carpet. The local Fiat agent adjusted the door seal, to no avail, and then re-fitted and re-sealed the windscreen, which solved the problem of water ingress. Now, six months after the windscreen was refitted, it has cracked from about four inches above the bottom offside corner down to the bottom of the screen, and then right across to the nearside edge. There is no sign of any impact damage to any part of the windscreen. The dealer says that neither they nor the windscreen fitting company will pay for the cost of replacing the windscreen and that "these things just happen for no apparent reason". Is this a reasonable stance for the dealer and windscreen company to adopt, or should they pay for the cost of replacement?