After preparing your space and making sure the walls are smooth it’s time to wash your walls free of grime. Prepare a mixture of lukewarm water, 1 TBS dish soap (which can be substituted for mild soap, or grease-cutting detergent), and baking soda. Once the solution is prepared, take a cloth or sponge and submerge it in soapy water. Once it’s fully saturated squeeze out most of the water. Wash walls with the damp sponge (slightly damp cellulose sponge) or cloth in a circular motion to remove grime. Make sure to rinse your cleaning tool with warm water every so often to keep it from spreading dirt or grime. When you wash your walls before painting it’s important to make sure that your wall is in good shape through the process. If you scrub too hard or use too much water, your wall will begin to feel spongy, soft to the touch, or you see old paint coming off on your cleaning tool. Stop and let your wall dry completely before continuing.
Once your wall is washed and dry, run your hand over the surface to check for a residual cleaning agent. If the wall is tacky to the touch, repeat the step above until you have a smooth surface. It’s important to make sure the walls are free of any residue or the paint will not adhere properly.