I have never seen a glass shop take  responsibility against glass unless they are supplying it .
        I know I never would . I think that if most peoples glass were tires , there would be steel bands showing through them . 
        When you have trouble seeing through it in the sun and the blades do not clear so well . It is time for a new glass . 
         I am A local list S F area list member .
         I can provide parts and materials and am able to Re Chrome your windows if you like that look , and do it without any special tools .  

-Stacy