11/09/2026
Many professionals equate a completed cleaning with clean equipment. On shared manufacturing equipment, the difference matters: residue that survives cleaning can carry into the next product, batch after batch. Professionals in Operations, Quality, and Validation roles all influence whether cleaning works, and understanding what cleaning validation demonstrates helps them recognize a cleaning gap early. Our new blog post explains the principle through an FDA warning letter finding, in plain terms. https://www.brayearst.com/validation-griot/cleaned-is-not-clean-enough