Microscreens on Maytag Dishwasher

Question

My Maytag dishwasher is not getting dishes as clean as it used to.  It feels like the dishes are not rinsed as well as they previously were, and particularly on the top rack, it feels like there are small food particles that got sprayed on the dishes and not rinsed off before the dryer cycle starts.  I have heard that Maytag uses a microscreen technology and that over time, either food deposit or hard water deposits will cause it to clog.  Any idea how I replace the screens or fix the ones I've got?

Thanks