The first step to cleaning acrylic paint off your paintbrushes is to remove excess paint from the brush using a paper towel or clean cloth.
Using a jar filled with water, swish your paintbrush in the water to clean off as much paint as possible from the bristles.
Use a clean cloth to make sure you have cleaned off the paint.
Repeat this process if necessary with clean water to remove as much paint as you can.
You can also use dishwashing soap if you want
Finish by using a brush cleaner and preserver tool to ensure your brushes are kept in the best condition possible.