Coincidentally, I did that yesterday.
I have a Scooba. Monday I finally got around to researching alternative cleaning solutions for it (the stuff iRobot sells is expensive and since then changed the formula smells terrible). Found that there is a cleaning-product-available-in-the-supermarket that works fine, so Monday night I charged up the battery and bought some of that stuff, and yesterday I made it mop the kitchen and bathroom. Several times; they were pretty gross.