Great question — answering as the UphillTech team:
First, rinse with cold water. Hot water will set the stain. Poop & blood foam when you put hydrogen peroxide on them. Let it sit for a few minutes. I’ve then scrubbed with soap or detergent; I’ve rinsed first, then added the soap. RISKY : I’ve put on hydrogen peroxide & sprayed with bleach. (small quantities & Cl is heavily diluted) It gets warm & bubbles more. Best on white material.
Full answer by Concha: https://lifehacks.stackexchange.com/a/26730 (CC BY-SA 4.0).
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