Staple at a car wash

RAG

You might find this soaking wet and draped over a bucket after scrubbing down a vehicle.

A "staple" at a car wash hints at something commonly used there, and "rag" fits perfectly since it’s a basic tool for wiping down cars. The word "staple" also plays double duty—it can mean an essential item, but it subtly nods to the idea of a "staple" (like a fastener) holding things together, though here it’s just straightforward. Think of the cloths you’d grab to dry or buff a vehicle after washing.