A process to clean a polyurethane article, which has been cured on a form, so as to remove non-volatile residues and low-volatility residues from the article before the article is removed from the form, which process comprises immersing the form bearing the article in a bath consisting essentially of a solvent selected from isopropyl alcohol, hexane, and blends of isopropyl and hexane, at an elevated temperature of approximately 60° C., for a predetermined time not less than approximately five minutes, withdrawing the form bearing the article from the bath, and drying the article on the form.