Thus making the Wookies' love of Christmas even more baffling.
Mayhew also had to keep this in mind during the famous trash compactor scene in A New Hope. While the actors weren't standing in an actual pool of garbage and Stormtrooper poop, they did have to waddle through a mixture of water, oil, and diesel. Imagine having to take that shit to the dry cleaner. Mayhew's solution was to find a ledge to stand on so that he could minimize the amount of gross on his costume -- which is why when you watch the scene, you may notice that Chewie looks like he went off to mark his territory on the corner at one point.
Alas, none of that could protect the most important part of Chewbacca: his beautiful face, which sometimes fell off. Mayhew's body heat would repeatedly cause the Chewie mask to separate from the costume's eyes, as if he'd peeked inside the Ark of the Covenant or something.