Removing the dirt from the crack remains a cause of major concern since the insertion of the dirt into the crack makes the repair much more complex. Then the replacement will be the only option left for you.Another layer of protection can be ensured by parking your car in the interiors since heat or rain can further worsen the situation with thepo420 code cracks a hard way and lead to further problems.Make sure that the temperature is not too high or not too low since it can lead to the heating up of the small cracks and might not do well for the windshield. So one way to avoid this is to keep the temperature at a moderate range.One of the important points to keep in mind is that you have to drive most safely to avoid further problems with the crack. Driving with carefulness must ensure that unwanted problems are not created via the cracks during driving.