I have been to court several dozen times in my lifetime over petty crap. I have ZERO convictions. You must know how to work the system and the easiest way that I have found is this. When asked about your representation calmly say,
"I am going to retain an attorney when I get this into Superior Court and can present the case in front of a jury. At this point it is a waste of my money to bring an attorney here for something I can easily handle myself."
1, no judge wants their decision over-turned. 2, the DA does not want to lose a case. They would rather dismiss than lose. 3, The DA does not want to spend the time wasting a couple of days going through jury selection and everything involved with a jury case over petty bullshit. This makes them look bad to everyone involved.
I have done this dozens of times for all sorts of petty things I have done from speeding tickets to fighting in the bars and gotten the case dismissed at the district court levels. Don't let them push you around and let them know you are willing to go the distance with this and waste everyone's time who is involved just to prove your point. You will get dismissed 99.9% of the time unless the DA knows you are fucking his wife or something.
Learn how the system works and use it to your advantage. Getting petty cases dismissed are one of the easiest things on the planet to do. Only 1 in 12 people who are arrested ever get convicted in the US. The other 11 are either acquitted, plead out, or have the case tossed.