If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension: 9 I3 l' s _+ v% Z& j2 {: C8 p- z% [, {) ~" O$ p
(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot. d% Q& v4 U6 w! q
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(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 @" L5 ~' \/ u $ q. \$ w) L) |% S+ q1 E(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.