When you see a crack in your windshield, don’t panic! There are things you can do (and things you shouldn’t do!) to prevent it from getting worse:
Measure the crack: If it is less than 12 inches long or smaller than the size of a quarter, the damage can be repaired rather than having to replace the entire windshield.
Check the location of the crack: If it is in your line of vision while driving, you should get it fixed before driving anywhere.
Protect the damage from dirt: Dirt, dust and other particles getting into the crack will make it more difficult to repair. Cover the crack with a piece of clear tape.
Keep your car out of the sun: Built-up heat may weaken the windshield and cause the chip to grow and spread.
Contact an auto glass provider.
Ignore the issue: Small cracks and chips will spread if not repaired, and may result in eventually needing a replacement. Larger cracks can also affect your visibility while driving.
Crank up the air conditioner or defroster: Extreme temperatures may compromise the integrity of the windshield.
Wash the vehicle: If water gets into the damaged area, it can cause the crack to spread.
Repair cracks larger than 12 inches or the size of a quarter: This extent of damage is cause for replacement.
Take your car to a general mechanic: Choose an experienced auto glass specialist.