I have a very old-gen roomba, but I just press the button for it to run as I walk out the door for work every day and my apartment floor is constantly spotless.

I have a very old-gen roomba, but I just press the button for it to run as I walk out the door for work every day and my apartment floor is constantly spotless. It may not have amazing suction or intelligence (though I hear newer ones are smarter...), but it will randomly cross over the same spot a few dozen times during its run, and that seems to make up for it.