Keep reading to see some surprising ways you can use washing-up liquid around your home. We’ve tested supermarket own-brand washing-up liquid and leading household names. Fix a creaky doorPossibly topping the list as the most surprising use for washing-up liquid is using it as a remedy for squeaky doors. So whether it’s clothes, carpets or upholstery, washing-up liquid is a strong contender for a good stain remover. Clean your bathroomA good washing-up liquid lathers exceptionally well and lasts.