Our run is covered by a metal roof, which was working nicely to keep out the rain. Then, a couple of weeks ago, we had a few days of sideways rain, something crazy like 9 inches in 2 days b/c of Tropical Storm Ida. Since then, our run has been a muddy, disgusting mess. Because of the roof, it gets little light and just hasn't dried out completely. Is there anything I can do? I threw some straw in there, but it just got gross. Can I add some dry dirt on top? Thanks for any advice.