It's generally not recommended to get a car wash with a cracked windshield. The high-pressure water, mechanical brushes, and detergents used in automatic car washes can easily worsen the damage. A small crack might spread into a larger web, compromising the structural integrity of the glass and potentially leading to a safety hazard. For minor chips under 6 inches, a touchless car wash is a slightly better option, but the risk remains. The safest course of action is to have the windshield repaired or replaced before washing your car.
The primary risk involves the laminated glass construction of your windshield. This safety glass is designed to hold together in an impact, but a crack weakens its bond. The pressure from a car wash can force water and debris into the crack, exacerbating it. Temperature changes during the wash and dry cycle can also cause the glass to expand and contract, further stressing the damaged area.
| Crack Size (Diameter or Length) | Car Wash Type | Risk Level | Recommended Action |
|---|
| Less than 1 inch | Touchless | Low-Moderate | Proceed with caution; avoid direct high-pressure spray on the crack. |
| 1 to 6 inches | Touchless | High | Avoid. High risk of crack propagation. |
| Any size | Soft-cloth or Brush | Very High | Strictly avoid. Physical contact will likely worsen the damage. |
| More than 6 inches | Any Type | Extreme | Do not drive through a car wash. The windshield's structural integrity is severely compromised. |
| Crack at the windshield's edge | Any Type | Extreme | Avoid immediately. Edge cracks spread quickly and are most dangerous. |
If you must wash the car, hand-washing is the least risky alternative. Use a gentle stream of water and a soft microfiber cloth, carefully avoiding the cracked area. However, this is only a temporary measure. Consult a professional auto glass service to assess the damage. Many insurance policies cover windshield repair with little or no deductible, making it a cost-effective and safe solution.
