Depending on the chip, there are ways to prevent it from cracking out. Many chips become cracks because of temperature change. If the windshield is cold, direct the heater to the floor. This allows for the windshield to warm up slowly. Do not go through a car wash until the repair has been made. The cold water on a hot windshield can cause a crack to happen. Avoid large bumps such as potholes and speed bumps. The stress on the vehicle can cause a crack this way also. If you have a subwoofer in your vehicle, be sure to turn it down until the repair is made.