When faced with these type of challenges at clean up time, I ensure I am providing a great deal of positive reinforcement to the children that are cleaning up. They are getting hi five's, kisses and hugs, stamps on their hands and clapping for a job well done. I focus on that and the child that isn't cleaning up quickly follows suit so he can gain the same recognition.

For the spitting.....I had a child several years ago that did this. The parents were quite proactive in working with me on this but nothing we did helped at all. Finally after having the child spit everywhere, the mom flicked him on his lip one day and it startled him. He didn't do it anymore at her house. I ended up doing the same thing here at his mom's request and it worked like a charm. Not sure what the parents are like that you have, if they would do something like that.