Hello Gang!
I use fresh grass clippings as a layer of mulch in my beds, for nutrients, as many a gardener does, but I've noticed that, after a while and as it dries, it sticks together and water runs off the surface, instead of in to the soil.
It seems as though once the clippings begin to dry, there is some type of "film", for lack of a better term, that is responsible by sort of behaving like a sort of "glue".
I live in the city, on property the size of a "postage stamp" (42ft. x 150ft.), so I only have a small, plastic compost bin, and really no room to expand the effort, at least in an attractive, not so offensive to the neighbors kind of way, so once fresh clippings are layered in the bin, there are plenty left over, and I just spread the remaining love throughout the gardens. After a while, though, I find the need to break it up a bit with a pitch fork in order to allow irrigation and rain through to the soil.
Is there something that can be done to avoid the problem? You know, save the back strain a little? The garden beds are expanding, and I prefer not to spend my time on this chore, if at all possible...