If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension: : j; T* E5 O# \# {7 a 8 k: v7 x' B+ k' n0 l' `) K; J& e(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot 5 I* D$ L8 _6 |+ Q9 s" Z( q0 T ( ]5 N/ R0 a* u% Q$ k(2) To buy a round or square think-glass-disk with diameter or side length of 1 inch. If you can't find it, you can go 99 cents stores or dollartree to buy a large-clear-cloth-button at similar size.3 W; }/ g4 v* A
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(3) Prepare Epoxy well, spread the paste to one side of the glass or button, attach it to the crack-upper-end from inside of windshield. Wait for 24 hrs. It'll be as solid as a rock and permanently stop the crack extension.