Clean the brush in a small container with the proper solvent. Repeat step 1 with a container of clean solvent Twirl the brush inside a trashcan or bucket to remove any extra solvent. TIP - Most commercial paint stores carry a paint spinner. This tool can be used to quickly spin the brush or roller to remove most of the solvents or water. Wash the brush with warm water and soap.
Shampoo works well and helps to replenish the oils in natural bristles.
Rinse the brush thoroughly to remove any soap remaining and spin the excess water from the brush. Wrap the brush in brown paper or a heavy paper towel to help re-form the bristles. Secure the paper with masking tape or re-insert in original cardboard protector. That's all there is to cleaning a paintbrush. The whole process takes about ten minutes.