I Am A Failure When It Comes To Cleaning Paint Brushes
If the paint starts to dry in a brush, it drags.
For enamels, you can thin the paint with thinner.
For latex you can start with a damp brush.
I use dish soap to clean my latex brushes with cool water, I can get 10 years or more out of a good brush & I use them a lot.
(hot water can harden the paint in the brush)