I don't clean em...After the 1st coat I usally put the roller into a platic bag, squeeze out all the air and I can use it the second time. Then through it out and use another for the next two coats...and so on.

The tray I use mineral spirits and an old rag...just pour some mineral spirits in, use my foam brush and douse everything, pour into an old container with a lid..and wipe it down with the rag...cleans up pretty easy.