What do you mean by crack your driver's side? Since you put in speakers and then it happened, logic would point to that as the source. Did you go with larger diameter speakers and had to use a spacer? One thing that could be happening is the terminal on the speaker on the driver's side could be shorting out against the metal opening in the door. i know Innovative Automotive's spacer instructions tell you it's a good idea to line the exposed metal with electrical tape to prevent this. A short might cause your radio to cut out and then when you hit a bump, the speaker slightly moves enough to break the contact. As far as washing and my presumption, water droplets will travel down your window and could be making that connection all over again between your terminal and metal. My advice is pop the driver's door panel and speaker and check it out.