Most fresh stains come out cleanly when treated promptly. Wine, coffee, makeup, oil and ink each respond to different chemistries — there is no single 'stain remover' that handles everything.
Wine, coffee and tea are water-soluble and respond well to gentle agitation and a tannin-targeted treatment, especially if they have not dried. Oil-based stains like salad dressing, lipstick or grease respond to solvent and need a pre-treatment before the dry cleaning cycle.
Set stains are harder. Heat — from a dryer, sun, or an iron — can lock a stain into the fibers permanently. So can age: protein stains like blood or egg cross-link with the fabric over time and become much harder to remove.
At Joy Dry Cleaners every garment is inspected at intake. If a stain is unlikely to come out we tell you up front before any work starts.