Picture by ktpupp
In her book Hard Work—a fascinating account of trying to survive on the minimum wage—journalist Polly Toynbee deploys several cost-cutting measures, including this one:
I know a trick with shampoo from an article I wrote about detergents years ago: there is virtually no difference in the chemicals used in washing-up liquid and in shampoo, so I used a little diluted washing up liquid.
No doubt our cosmetics-loving readers are cringing, but the logic is already evident in the all-in-one shower gel/shampoo combos you can find everywhere these days. For another unexpected detergent deployment, try using it to unclog a toilet.