On Tatooine, C-3PO suffered from dust contamination.
Ailments from dust occurred when droids had their joints clogged with sand or dust, which significantly hindered their movement. An oil bath was a solution for this problem, where the droid would be immersed in oil.
While journeying through the desert world of Tatooine, specifically the Jundland Wastes, the protocol droid known as C-3PO experienced dust contamination.
The first appearance of dust contamination was in the 1977 motion picture, Star Wars: Episode IV A New Hope.