Eco-cleaning for lazy people: Removing stains from cloth nappies

I've just discovered the bleaching power of the sun!  Henry's Diddi Diapers were quite yellow with breastfed poo stains, as the one on the right in the picture shows.  The Diddi on the left has been through the following cleaning process to remove the stains:

1. Dissolve 1 cup of borax in a bucket of warm water and soak nappies over night
   
2. Wash nappies in the machine with half the manufacturers recommended amount of non-bio washing powder
3. Run nappies through a second complete wash cycle, without powder to thoroughly rinse out the detergent
4. Place nappies in direct sunlight to dry

The nappies were much better after the washing, but much of the staining was removed by the sunlight.  I placed the nappies inside in front of the window today and within 1 hour the difference was noticeable, even with the January winter sun!