Wall and floor of the bathroom
In a bucket of warm water, mix a half cup of vinegar, one of ammonia and half of bicarbonate, apply this solution with a sponge or brush, then rinse with a damp cloth.
When you finish using it and is still hot, wipe with a damp cloth and sodium bicarbonate.
If you stored food and the smell infuses your containers to remove it you can soak them half an hour in water and bicarbonate.
If you got cought up chatting and burnt the bottom of a saucepan do the following: boil in it a handful of cooking salt (which comes in pellets) and water and simmer for 1 hour. Remove from heat and let soak overnight. Then wash as usual.