I have tried everything and now have a strong preference for 1" welded wire for the coop floor, with a foot or two of open space below (open space is ventilated but blocked from wind). It is not good for their feet to be on this surface for long periods, but they only walk on it to get to the roost or to the nesting boxes. No cleaning necessary because the poops fall through to a compost area below. I add occasional dry leaves, grass clippings, DE, stall dry, +/or pine shavings to the poop area about every few months and then harvest the compost once or twice a year for the garden. It is so much cleaner than any method I've tried. For the run, I use sand with a little dry stall / DE added on occasion. Also cleaner than anything I've tried, probably cleaner than most people need because my coop is only 25' from my house and my neighbor's house, I have a sensitive nose and I have a very low tolerance for flies.
My second preference for the coop floor would be linoleum (not vinyl, for ecological reasons, unless it is used) covered with pine shavings or sand with a little DE or stall dry.
Good luck!