If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension: ) b( S7 P+ @, C4 K+ q, c4 X9 Y " ^3 j& ]0 F6 j$ k0 @(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot * e" l" K& s9 C% ~. A" }" d9 N & ^4 s- Y4 ?& x1 Q# s7 y5 A(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. : H1 ]: y1 ]: z$ l( r ' ^$ K$ m4 y5 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.