Can't you just grate the natural soap, soak it in water and put into a pump pack once sludgy? I read that's what people do with the last slivers of soap to use every last bit.

Or are you talking about the liquid detergent bit? Eco store make one. I was going to check it out to mix with the bicarb for the creamy soft scrubbing paste. Sick of not being able to clean the bathroom when baby around. I'm an ex cleaner so basically had "bleach, bleach, bleach" drilled into me but I really don't like it near DD
Well i dont really know what the washing soda is. I've looked in the supermarkets but havnt found anything called washing soda. Maybe its called something else.

I've heard a lot of people use the lux soap flakes so perhaps I could add water to that and use as the liquid soap???