There are two ways to use solid dish soap bars: you can swish them through a sink full of hot water (in a net bag, strainer or soap cage if you have one, or just in your hands) to dissolve some soap into the water and from a lather; or you can simply use your wet brush, sponge or cloth and rub some soap directly onto it before you use it to wash your dishes. Check out the full review for more on how to use solid dish soap.