You might want to try the "sacrifice". Take a bit of Kringles into the tank. Let it be for a while, then dump it out.
Sorta like to really clean a printing press, you ink it with white ink, then clean it out. The white ink dissolves any remnants of old pigment.
Sorta like to really clean a printing press, you ink it with white ink, then clean it out. The white ink dissolves any remnants of old pigment.