Oil bath/Legends

Oil baths were a means of removing such things as dust, dirt, and other various forms of matter that could cause a droid's joint's to lock up or become difficult to move. Luke treated C-3PO to an oil bath on the moisture farm, and the Great Heep used them, along with other droid pleasantries, to keep droids from assuming that they were in any real danger.

Appearances

 * [A New Hope]
 * [The Great Heep]