Thanks for the update.

I use bi-carb and vinegar sometimes, but I find bi-carb doesn't work well with baked on food or pots. But, if I have a load that is (as you said) 'lightly dirty',then it works fine. Otherwise, I use Eco-store powder. Might skip on the soap nuts for the d/washer then and stick with bi-carb and vinegar (and back up Eco store powder).