Boiling water will get you liquid soap
Sometimes when we use bar soaps, we feel that our hands are oily. This is caused by glycerin, which is the product soaps are made of. There is a way to solve this that is easier than you think. If you have an extra bar of soap, you should try it. You may even feel (or predent to be) like a scientist while doing it.
Put water in a pot and wait for it to boil. When bubbles appear on the surface, pour the bar soap inside and wait. Using a wooden spoon, stir until the bar has completely melted. After a few minutes, turn off the heat and transfer the mixture, which is now liquid soap, to a jar or bottle. The last thing you have to do is place it in your bathroom, ready to use.