As I don't have that many nappies as yet (was waiting for the new fuzzi bunz but have caved and bought a swaddlebee and blueberry) but I find it hard to guess the amount of detergent.
Anyway, nappies I have are smelling faintly of wee so what do I do? Is it white vinegar? How much and do I then need to rinse loads etc?
I dry pail, wash usually at 40 with a rinse first then I do a 60 wash when needed.