I leave grotty bibs to soak in vanishoxywotsit overnight then wash with bio powder and soda crystals. Re banana I found that rubbing the stain with the vanish soapbar, rubbing with a lil nailbrush then washing twice with the soda crystals and bio powder did get the stain out. Damn my MIL who buys her posh outfits to ruin. White vinegar is excellent for washing machines as it cleans out all the internal soapscum etc so makes your washer work more effectively. I stick some in the prewash bit of the drawer occasionally when washing towels/nappies as it also helps keep them soft if you live in a hardwater area.