Chris, left, above, and Richard arrived today to replace the glass top of the Wolf induction cooktop.

Why? The glass sometimes displays a fractalizing crack that travels from element to element. It appears. It disappears. We reported this 26 June to Ranserve and to Kristin at Harway. The cooktop is covered under warranty. Harway set up a factory repair.

To remove the cooktop, Chris and Richard used a knife to slice apart the rubber gasket that goes between the underside of the glass and the quartz countertop. This gasket apparently compresses over time and begins to resemble silicon sealant. In the process of slicing apart the seal, several sections of the original gasket were peeled and sliced away, leaving a ragged gasket behind.

Wolf supplied the replacement glass — but not a replacement gasket. “Sometimes they do, sometimes they don’t,” Chris said.

They will need to obtain a replacement gasket. Chris said he would order this and schedule a second service call when it comes in.

Steven is surprised that a replacement gasket was not shipped automatically with the replacement glass cooktop.