D.N.
I have a very messy 7 yr old and slightly less messy 4 yr old. For those really tough stains, I use Zote soap. It gets even ink marks off. My 16 yr old likes to put his pens and pencils in his pocket and forget about them. I find them when sorting laundry but there are already ink stains . Oxy is my best friend for all the rest. For really bad stuff, I either use oxy with just a bit of water or put directly on the stains (wet clothes and then sprinkle water to make a paste.