One of the best ways to prevent diarrhea diseases is to wash hands after defecating or handling babies' feces, and before preparing food, feeding children, or eating.
Keeping a source of clean water near your home will make hand-washing much easier. But washing with water alone is not enough. To make hand-washing effective, use soap to remove dirt and germs. If no soap is available, use sand, soil, or ashes.
Rub hands together well with soap and flowing water like that from a pump, faucet, or tippy-tap. Count to 30 as you scrub your hands all over. Then rub hands together under the water to rinse off soap, sand, or ashes. Dry with a clean cloth or let your hands dry in the air.

The tippy-tap is a simple device that allows people to wash hands with very little water. It also allows the user to rub his or her hands together while water runs over them. It is made of materials that are available at no cost in most places and can be put wherever people need to wash their hands: near the cooking stove, at the toilet, or in rural food stores, for example.

In many places people wash their bottoms with water after defecating. This anal washing is a very effective way to stay clean. But because the water used gets contaminated with feces, it must be disposed of carefully. Never dispose of it into a stream or lake. Empty the container into a toilet or into a waste pit at least 20 meters from any surface water, wells, or springs. The container must be kept clean too.

To make 4 kilos of soap you will need:

Fresh oil or fat is costly. Dirty oil or rancid fat can be used to make soap, but must be cleaned first. To clean, melt oil or fat in an equal amount of water and bring to a boil. Let it cool, and skim off the oil or fat. If it still smells bad, do it again with new water. If the oil or fat has dirt in it, melt it and pour it through a fine cloth until it is clean.

Perfume or essential oils give soap an attractive scent. For 4 kilos of soap, use one of the following: 4 teaspoons of sassafras oil, 2 teaspoons of citronella or lavender oil, or 1 teaspoon of clove or lemon oil. For soap that promotes healthy skin, add 1 or 2 teaspoons of oil of neem, moringa, jatropha, or baobab.

1. Add lye to water - never the other way around. The mixture will heat up. Let it cool to body temperature. Do not put fingers in the solution or it will burn. To test the temperature, feel the outside of the container.

2. Melt any solid fat in the oil/fat mixture.

3. Pour the lye water slowly into the oil/fat mixture, stirring it constantly in one direction. Then add perfume or essential oil. The mixture must be stirred for at least half an hour after all the lye has been added. The mixture should become thicker. When the spoon causes lines to appear on top of the thick solution, it is ready to pour in the molds.

4. Pour the mixture into lined molds and leave to set undisturbed for 2 days. If it has not set or if it has grease on top, leave it longer.

5. When the soap has set, remove it from the molds and cut it into bars using a knife or a wire.

6. Stack the bars on trays and let them sit for 4 to 6 weeks. Do not use the soap too soon - it still burns!

7. When the soap is finished, you can shave it from the bar in curls. Touch the soap to the tip of your tongue to check its quality. If it has a slight bite or burn, it is good. Cover the soap so it does not lose moisture.

If it is very sharp and burns, there is too much lye. If it has no bite, there is not enough lye. If the soap you made was not successful, it may have been because: