The short answer: how to get stains out of a couch has no single answer, because a stain is a chemistry problem and the three most common ones need opposite treatments. Ballpoint ink is oil-based, so it needs alcohol and water spreads it. Blood is protein, so it needs cold water and warm water cooks it into the fibre permanently. Chocolate is protein and fat together, so it needs the solid lifted first, then cold water, then the grease dealt with separately. That is why the universal advice to dab with warm soapy water works on some stains and quietly ruins others. Identify what you spilled, check the cleaning code on the tag, and match the method to the chemistry rather than to the fabric.
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