Here are the two powders I finally settled on for my own use :
For cloth nappies/childrens clothes
- 1 cup Baking Soda
- 1 cup Washing Soda
- 1 cup Baking Soda
- 1 cup Washing Soda
- 1 cup Borax
I also put a good dose of white vinegar in the softener holder :)
Other people have used the previously posted laundry powders without the gunk build-up issue so don't be put-off but I personally find the above is the simplest, most effective option for me and my machine!