​In this 18th episode, Craig Chapman explores the unwavering honesty of the spirit level, a tool that remains the ultimate arbiter of truth in an inherently wonky world. From Melchisédech Thévenot’s 17th-century discovery that alcohol (spirits) makes for a better bubble-vessel than water, to the modern use of fluorescent fluorescein to provide that signature radioactive glow, Craig tracks the journey of the horizontal.

​The episode features a personal investigation into Craig’s own refrigerator and its 1.2-degree lean toward the kitchen door—a discovery that has significantly altered his kitchen-based equilibrium. In the "What Do I Have Here?" segment, Craig examines the industrial silence and questionable mint flavoring of a 40-meter container of unwaxed dental floss.

​This episode also includes:

• ​Administrative Refresh: An update on the podcast's steady growth, now averaging 70 downloads a month.
• ​The Grout Gallery: Announcements regarding new high-resolution additions to the website’s tiling archive.
• ​The Listeners Corner: Craig addresses Arthur from Birmingham's query on postage stamp perforations and Eleanor from Vermont’s deep-seated distrust of high-velocity hand dryers.

​Join us next week as we investigate the Rubber Thimble, followed by an upcoming inquiry into exactly how long it takes for the verge puddle to become stagnant.