Oh and I forgot to ask..

I am finding that my nappies still smell of ammonia even after washing them and hanging them on the line to dry. My washing line gets heaps of sun. I use 1/2 the amount of earths choice liq and usually wash on 40degrees with an extra rinse. What am I doing wrong? Do you think it's cos I sometimes leave them three days before washing (as I don't have enough for a load)?

Thanks