Peter, our 1968 WK did have the sani-heat (as it was called) on the final/3rd rinse. ON ours it heated for about 6 or 8 minutes and then the timer paused if the temp hadn't been reached. For the cookware cycle, that last rinse had the longest spray period of the whole cycle, that enitre 9 minutes or so. It did not pause to heat the water before spraying. And yes, the dry cycle didn't turn on the heater on Cookware for the same reasoning as you stated. Our 1959 WK, the pots/pans cycle did prewash, wash, and first rinse. Then it shut off--the manual specifically stated lefton moist soil would be easy to remove. Incidentally, Gaffers & Satler dishwashers did a similar routine for pots & pans cycle, a wash & two rinses and then shut off.