The reason that cracks often start on the edges of the automobile windshield chip repair is because the edges are the structurally weakest area. The frit is on the glass because it keeps the ultraviolet light from the sun away from the polyurethane seal that holds the windshield in the frame. Without the frit, the windshield would quickly start leaking or just pop out of the frame of the car.

Not wearing disposable rubber gloves when handling auto glass Oils and dirt from the installers' hands can contaminate the bonding service of the windshield.
Some would ask, "Repair or replace?" Considering the pricey cost of fix auto glass, one would rather choose a rock chip repair kit. This specific line of kit is widely available in shops online and local and if you want to try the benefits of having them, shop around and get one for yourself and for your auto's need.
Do-it-yourself repairs are the cheapest option but if not done correctly, it may cost you more. If you plan to do it yourself, it is important to choose the best kits. Research or seek the advice of experts so you would not be sorry. There are two types of windshield repair kits. The first is the less expensive syringe-type. The kit includes a syringe and the resin, intended for one-time use only. It contains just enough resin to repair one chip. The second type is the more expensive bridge system that includes the resin's and a plastic bridge. This type can be used several times because it is refillable.
Still no big deal? In some states it's illegal to drive with a crack in the windshield that is in the driver's line of sight. In other states it's illegal to drive with a cracked windshield at all. I'd call that a big deal.
Dash repair is an art and a craft, just like all automotive interior repairs. If the steps are followed right and patience is used in your repairs you success will be good.