I do a 50/50 ratio of vinegar and lukewarm water although you could probably get away with less vinegar. And more? Ive done straight vinegar for old ass pit stains on an amazing white vintage piece. I’m talking 50 year old sweat here. For the dawn and h202 is about the same 50/50, but I have a few different processes. General and new stains I use my spray bottle technique, straight h202 and the dawn is pretty heavily concentrated soap to water. Like 2 tablespoons soap and 2/3 cup of water something like that. It’s usually perfectly effective. If it’s more stubborn or I have a batch of clothes with more serious stains I take a bowl and make a mixture of soap and h202 and apply the mixture right into the stain, (again about 50/50) rubbing it in to let it sit. I use a toothbrush. For whites and really stubborn stains you can add baking soda, however the baking soda can turn that mixture into a bleaching agent so if you’re using colors you want to be mindful of how long you let it sit, start with 5 minutes and work your way up from there. Then, vaguely by color (sorry for all this detail lol I’m sure you won’t be washing clothes in an assembly line like I do but now that I’ve started I can’t stop) I soak them in a tub of lukewarm water for however long before washing and rinsing normally. I line dry a lot because actually the sun helps remove stains too believe it or not! And it’s gentler on vintage and the environment. Welp now you’re ready to start your own laundry service hope that helps