Startup Problem After Washing

In 1800 miles, haven't had a single startup problem -- until today. I pushed the start button and it went "chugachugachuga" over an over but wouldn't start. I eventually got it going by giving it a little gas with the throttle. The only thing that has happened since the last time I started it was washing it (a couple of days ago). Could that have anything to do with it or do I have a bigger issue that needs dealer attention?