As an aside... if you soap up the brush before dipping into the fluid it´s easy to clean. Or... just dip the brush into water first and make a point of rinsing the brush after every second dip. Works a treat and I´ve even used my (heaven forbid

) kolinsky sables with no damage whatsoever.
After I would finish each painting session I wash the brushes with a pure natural soap (no additives), reshape and hang them with head down to dry before putting them away. No fuss, no muss, no worries!