what does the word "clean" mean on a chrysler 300s dashboard? on 2013 Chrysler 300

Brand new car pulled into a brushless carwash and the word "clean" appeared on dashboard, went out after a bit and then later in the day it reappeared again for a short while. Does it have something to do with the car wash and the clearance under neath?

Asked by for the 2013 Chrysler 300
1 answer
Is there , or was there at any time , a little book labeled 'OWNERS MANUAL' in the glove box????????.............Is it silver and shiny? Maybe the IEDSS is faulty. (Integrated Excessive Dirt Sensing System)