That simple jar with a smooth coil insert sitting on my palette is the best brush-cleaning tool I’ve ever had. I have mine filled with Turpenoid and periodically poor off the clean stuff, wipe out the sediment that collects at the bottom (the coil is easily removed for access) and then refill with the same solvent. The write-up at Dick Blick Art Supply says:
Be kind to your fine art brushes!Stroking a brush across the smooth surface of the aluminum coil opens and separates the hairs for proper cleaning without damaging the fragile flags (the delicate split ends of brush hairs).
This heavy glass tank with a screw-on lid holds up to 12 oz (355 ml) of water, solvent or Silicoil Brush Cleaning Fluid.
Cheap at $6.00 a jar, this has probably already paid for itself in resurrected brushes.