How to: Clean Your Cooking Gear and Make Soap from Wood Ash

Posted on Aug 28, 2011 in DIY Projects

Kevin Hayden –

Source: Survival Topics

Using wood ashes as a cleaning agent makes alot of sense: it is readily available, free and relatively safe for the environment when compared to many types of soap.

Hayden’s Note:

I would recommend saving this one or printing it off in order to add it to your camping and survival gear. Better yet, practice it a few times in order to become proficient!  Many thanks to for the information!

When it comes to wilderness survival, large scale disaster simply camping outdoors, we often try to do things in the same manner as we are accustomed to doing them at home. However what works well in civilization does not necessarily translate smoothly to a wilderness or disaster scenario where familiar supplies of every sort are limited or non-existent.

Solutions are available to most outdoor and survival problems, if only we have the knowledge and inventiveness to use them. But because we usually spend most of our time in civilized society, where specialized tools and products are readily available, we lose some of the edge in our abilities to utilize the common items we find around us in the wilderness.

Consider the daily chore of cleaning your mess kit after a meal. There can be no doubt that the proper cleaning of your mess kit and cooking gear is an important wilderness or disaster survival task.  When it comes to the food you eat and the cooking gear and utensils that come in contact with it, a lack of proper hygiene can lay you low in short order.

Easy Access to Soap is Limited

In a disaster or wilderness survival setting you will often lack soap with which to wash your cooking gear. Soap takes up weight and space, which is a very important consideration when every ounce and every cubic inch of your gear must be measured against what is most important for your survival. Especially when on foot, the less you carry the better off you are. Hard decisions must be made on what you bring with you and what is left behind.

On extended stays in the wilderness or during a large scale disaster, re-supply from outside sources is unlikely. You will eventually run out of any soap you have so an alternative means for cleaning your cooking gear and mess kit is preferable, ahead of time!

When practicing survival skills in the field I usually do not bring soap to clean my mess kit and cooking gear. To save on bulk and weight, I would forgo using any soap I had in favor of rubbing and swirling a mixture of water, mud and sand on cooking utensils in order to scour off caked on grease and food particles. Although sanding down cooking gear certainly removes food residues, it often doesn’t eliminate all the grease. And the mess kit and cooking gear sure take a beating.

For many years I was content on using the sand and mud method to clean my cooking gear when in the wilderness. But one evening while sitting around the camp fire after having washed the remains of the evening meal from my mess kit with the usual mud, sand, and water mixture, the smoke sudden cleared from my eyes and the world seemed fresh and new. I had independently made a discovery that had already been known for centuries.

Use Wood Ashes to Clean Dishes

With a flash of insight, I realized all the soap for washing my mess kit has always been right at hand. What’s more, the supply is inexhaustible and I do not have to carry it.

The answer to all my mess kit and cooking gear cleaning problems? Wood ashes. Back home I did the necessary research and discovered that cleaning dishes with wood ashes is a sound practice.

Wood ashes have been used for centuries as a source of lye in the soap making process. When lye, derived from wood ashes, is mixed with fats or oils, a chemical action takes place that produces what we call soap. While the chemistry behind this process is beyond the scope of this Survival Topic, its implications are not; if you have wood ashes (from a campfire) and fats or oils (in your dirty dishes) then you’ve got soap!

How to Use Wood Ashes as Soap

Before we even begin to describe in detail how to use wood ashes as soap in the wilderness, I want to emphasize the importance of washing your cooking gear far away from any water supply. Do not pollute the water sources that you, other people, and wildlife rely upon for survival.

Follow these basic steps for cleaning your cooking gear with wood ashes. As with most processes, the description is wordy but actually doing it is easy:

  1. Before you start cleaning your cooking gear with wood ashes there are some important considerations that should be addressed:
    1. The wood ashes used to wash your gear must not contain residue from plastic, food, or other trash that was burned in the fire; these substances could very well be toxic. To obtain pure wood ashes be sure you do not use ashes in which others may have burned items other than wood. You may have to build a fire at a fresh location from which to obtain pure wood ash.
    2. Water for washing anything that will come in contact with food must be first treated to destroy disease causing organisms. The Survival Topic, That Water is Unsafe to Drink goes into further detail on contaminated water and is required reading for any disaster or wilderness survivor.
    3. The lye from wood ashes can make your hands dry if left on for a period of time. Be sure to use gloves or rinse your hands in clean water after scrubbing your gear using this method.
    4. Do not use wood ashes to wash your body or any gear that cannot withstand harsh soaps.
  2. Ashes from hardwood trees are better for making wood ash “soap” than ashes derived from softwoods. In general, softwood trees have needles as leaves and do not shed them in winter. Hardwoods have broad flat leaves and in cooler climates often shed their leaves before winter sets in.
  3. Let your fire burn down to the point where you can easily extract wood ashes.
  4. Select the greasiest pot you want to clean. If the food residue is not very greasy you can help the soap-making process by adding a small amount of fat or oil into the pot. Butter, margarine, olive oil, animal fat, etc. are all good. Just a few drops are enough.
  5. Add a few cups of ashes into the pot. If there are bits of charcoal mixed in with the wood ash that is even better since charcoal will aid in scouring. Often I carefully add a few hot coals from the fire in order make hot water (see the next step).
  6. Add enough hot water to the wood ashes in the pot to make a paste. Because you are cleaning gear that will be touching food, you must make sure this water is free of disease causing organisms as stated in step one. You can either first boil this water to make it safe (see the Survival Topic on How Long do You Need to Boil Water?), or first add some hot coals to the pot as mentioned in step #5 above. These hot coals should bring the water up to a high temperature that destroys any organisms in the water.
  7. The hot water will create potassium salts from the wood ashes, which will then mix with the fats or oils in the food residue. This forms a crude soap that will cut through the crud and grease on your cooking gear.
  8. When the water and wood ash paste is cool enough smear it all over your cooking gear and let it set for several minutes. This is where the chemical reaction takes place that makes your wood ash soap.
  9. Scrub clean your cooking gear and mess kit.
  10. Rinse with treated water.

Cook with Wood and Save


Of course, being able to use wood ash soap means you must have access to a wood fire. In some areas open fires are not allowed or you may choose to use fuels other than wood for cooking food or heating purposes.

Survival Topics is a big fan of using supplies provided by nature’s survival supply depot rather than have to carry them myself. This saves on problems of procurement, expense, weight, and bulk; always welcome attributes when traveling in the wilderness.

Since in my area wood is always available and open fires are not restricted, I do my camp cooking on a hobo wood burning stove. The advantages of using a wood burning stove over stoves using other types of fuels include:

  • Do not have to purchase fuel.
  • Do not have to carry fuel.
  • The fuel supply will never run out – bits of wood or other natural burnable materials can easily be obtained anywhere I go.
  • The fuel wood is burned into ash during the cooking of meals. The ash is then used to wash the dishes so I never need to carry soap for this purpose!

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