The Stain Library, for removing the right stain from the right material

Why it surfaced

This is unusually careful household guidance: coffee on wool is treated differently from coffee on cotton, and methods are rejected when they would damage the material. If a combination has not been researched, the site says it will admit that rather than inventing an answer.

A household stain-removal finder that combines the stain, the material, and the age of the mark before suggesting what to do.