I have two kids
Therefore I have stain remover.
I usually buy it from a store and when I'm finished I toss the spray nozzle and recycle the bottom.
But an experiment, via the scientific method*, taught to me by Mr. Smith in eighth grade, has led me to consider two alternatives: make homemade stain remover or don't use stain remover at all.
Question: Will homemade stain remover be just as effective as store-bought stain remover?
Research: Very little! Except for finding this recipe for homemade stain remover.
Hypothesis: Store-bought stain remover will be more effective than homemade stain remover.
Materials: Dirty kid clothes
Dawn dish soap (except we won't be using Dawn specifically because I like using only what I have on hand. See: homemade laundry detergent).
Procedures: Create homemade stain remover using 1-part dish soap and 2-parts H2O2.
Spread ketchup on control, a white washcloth.
Spray part of clothing with homemade stain remover.
Spray another part of clothing with store-bought stain remover.
Leave part of clothing untouched to see if stain remover makes one stinkin' difference.
Observation: My kids are really rough on clothes.
Observation: The Outback is overdue for an oil change.
Observation: There's far too little dark chocolate in this house.
Conclusion: There was little difference between store-bought stain remover and homemade stain remover. There was also little difference between using stain remover and NOT using stain remover. But...it did get out a three-wash-old strawberry stain on my toddler's sweater so we've got a keeper.
Future Action: Toss my last nozzle, continue making the homemade stuff and use like you would a citronella candle - you aren't really sure it's making a difference but it makes you feel a little bit better.
*The word "scientific" in "scientific method" might be the only "science" actually used in this experiment.