I use a spoonful of vanish powder with the wash load it should take out all the hard stains including chocolate x
For the most part, a scoop of vanish in the wash gets most things out. Only stuff that has been left for a few days can be a struggle (usually I have forgotten to put the wash on)
I'm 2.5years in and still don't know 😂 if it's pure white then bleach otherwise it becomes messy play clothes 😂