When you’re ready to call it a day learn how to properly clean your oil painting brushes so they stay in good shape and can be used over and over:
Use a paper towel to wipe off any paint solids from your brushes.
Using a jar of solvent, swish your brushes around and tap off the excess solvent on the outside edge of the jar. Never leave your brushes standing in the jar of solvent.
Put a small amount of liquid soap in your hand and move the brushes around in the soap, cleaning and rinsing until the suds are whiteThoroughly rinse the brushes, wipe off the excess water, and then let them air dry completely until you use them again.
Store the brushes so the bristles are not bent. You can roll them in a canvas sleeve or towel to keep the bristles in shape.