Moshling Clean-Up is a sub-feature in the Moshling Zoo. The objective is to clean the Moshlings. On the door to the zoo and on the Moshlings themselves, there will bee a brown sludge icon to inform you of dirtiness. The Moshling do not become dirty if you do not clean them, it is just a randomised opportunity. Three Rox are awarded each time a Moshling is cleaned and that is the only gain you get out of it.