Originally Posted by Caslon
Its not soap or yukky stuff, the glasses are for the most part very clean looking. They just aren't neutral smelling when drinking purified water. Other drinks mask any odor, but purified water tells the tale that the dishwasher rinse cycle is imparting an odor to the glasses.
I think it might be that this happens when I let the load air dry instead of heat dry, longer time for the glasses to get smelly. I'm going to air dry a load and then heat dry a load and check the results.
In that case, it may be residuals in the dishwasher itself.
Try running it empty with a full gallon of vinegar in it. Stop it after it sprays the vinegar around well and then restart it in the morning when you wake. This will give the vinegar time to dissolve the residuals and mineral deposits that might be present in it's system. After it finishes, run a regular load through it and the smell you have noticed should be gone. The dishwasher will be very clean and shiny too.