Dry Cleaners Revisited is back by popular demand! Dry cleaners in urban environments remain one of the most common and difficult types of contaminated sites to investigate and remediate. In this recorded Talk, Guy Patrick re-visits some of the interesting and challenging properties of DNAPL solvents such as tetrachloroethylene. He guides us through some the early research an case studies that led to our current understanding of their behaviour in the subsurface, and the challenges they pose and opportunities they provide for effective remediation.