That lubricant is, of course, WD-40, and yes, you can indeed purchase the versatile fluid from Dollar General. It will, however, cost you more than a dollar, as a 7oz can is currently priced at $6.95.

Initially developed in 1953 by the Rocket Chemical Company for NASA, WD-40 was designed to prevent rust on rocket components. Over time, this versatile spray evolved into a must-have tool for ...