Being glass, I'd use straight vinegar from a jug and a green scrubby pad. If need be soak paper towels in the vinegar and set it over hard spots to soak. A good rinse is all you should need to clear out the vinegar, it won't hurt anything if any is left behind.
As for definition of nano, I think that varies from group to group. Some say 50g and under, others 30g.