Making Potassium Hydroxide

Get some charcoal that is of hard wood and burn it with a torch until it turns to a white ash. That white ash is Potassium Hydroxide. Other things that can be used to burn is banana peals, Coconut shells or halves, Hard wood like oak.

charcoal is the easiest to pertain and most is hard wood charcoal. The other would be too costly. But if you use bananas then you get a tasty treat as well. LOL just joking