I'm not an expert either, but adding any kind of cleaning equipment to the solar panels would likely add multiple points of failure and a bigger source of power. Also, blowing any kind of dust particle on the solar panels could damage them and shorten their life expectancy.

NASA has certainly been looking at a solution for this problem and I wouldn't be surprised if they found out the best solution to be what is currently being done, which is let the martian wind clean up the panels.