My mum taught me to use table salt. It cheap and it removes beer, wine, blood, grease - basically any liquid stains. Stops colours/darks running and sorts out yellowing in whites.
For stains.
Wet the stain with cold water. Rub salt into the stain. Soak in cold water with 4 tablespoons of salt for 1 hour. Put it in the washing machine straight after while still wet. For really stubborn stains that have been left a while you may have to repeat a second time. Very rarely my mum would use Vanish Soap or Dr Beckmans stain devil.
For Yellowing Whites.
Soak in boiling water with 4 tablespoons of salt for 30 minutes. Put in washing machine straight after while still wet. Items with sweat stains would also have
For Colours/Darks that Run/Fade.
Add 4 tablespoons of salt directly to the washing machine drum.
Smelly Clothes from Sweat/Ciggy Smoke or Musty from storage/wardrobe.
Soak in boiling water with 4 tablespoons of baking soda before washing.
Also turn everything inside out before putting it in the washing machine. It reduces bobbling, reduces damage/fading on prints, reduces colour fading, reduces damage to buttons/ribbons/sequins/beads and any other decorative bits on clothes.
An very important reminder - don't forget to clean your washing machine. I know it's a shit job we hate. Quick wipe of the door seal, empty the lint trap and clean the detergent drawer regular too. Leave the door/drawer open if you can. Once a month run a high temp service/clean wash and add some soda crystals to the drawer/drum because modern low temp quick washes cause bacteria build up.