Use watercolor brushes only with watercolor paints so you do not ruin the brushes.
Wet watercolor brushes before you start painting.
Set brushes in a brush holder or lay them down on the table while you are working. Do not set them in a jar or glass with the bristles pointing down.
Wash brushes using lukewarm water and a paintbrush cleaner or soap (not detergent).
Rinse brushes with the bristles pointing down.
Shake brushes to remove excess water instead of wiping them on a cloth or paper towel.
Re-form brush tips with your fingers.
Store brushes in a brush holder in a cool, dry place.