If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension:+ n! j; G; L7 b0 j% \
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(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot4 H+ |& Z" A" s4 ]# ?8 m
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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. % Y8 J: a) i% g6 V6 @3 a% H7 }. q) H4 G; E0 d9 A
(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.