FYI... I generally do dishes when I run out of clean glasses. That seems to be the indicator item in my kitchen. By the time all the clean glasses are used up, then there's enough silverware and plates and such to bother with a load in the dwasher.
Well, I guess if I were gonna run out of some kind of dishes it would be glasses first. But, I'm afraid if I waited to run out of something - with me here by myself - it would take several weeks. By then I suspect there would be bugs and odor!