If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension: $ Y4 N# O: b$ @ c; Q; F( [+ k+ t" P7 Z0 w e9 p' `
(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot/ d& O, w+ n! a E5 H: [
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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. - F c3 d& B. x) |8 O$ _1 e/ N( F0 o3 u+ K+ e w5 H4 m# }
(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.