Best way to wash breastfed newborn clothes?

[SmallSCREAMCap]

The words I am trying not to put in the header to protect the faint of heart are "poo", "runny" and "explosion"

DS is 7 weeks, exclusively breastfed and keeps pooing in shades of mustard right out of his nappy and up his back. Rarely had this trouble with DD, wondering if testicles act as some kind of flood barrier.

I have a growing pile of sleepsuits soaked in Napisan overnight and then washed in non-bio at 40, but just going straight back in the soaking bucket as the yellow stains persist. These aren't little perfectionist-worrying spots, either; these are dirty great back-covering yellow world maps of poostains.

It's worse than Fruit Shoots... anyone know how to get these out, before I search out a 3-6 months wardrobe entirely in shades of yellow, orange & brown?!

Yes, also agree - place them in the sun (although might be more tricky at this time of year but still worked for me even on not very sunny days). I think it is the UV that somehow bleaches the orange out. It is really amazing.

I scrub/soak with soda crystals (very cheap) then put in machine with non-bio detergent. Sometimes I put stain remover on the soiled patch as well prior to washing. Ime the quicker you spot clean the stain the less likely it is to stain.