The Elma has the drain on the right hand side. Since it is very finely controlled (down to drop by drop), I clean my solution by (1) arrange a clear plastic drain line with a dip in the middle (2) let the chemistry rest for a few hours (3) begin the drip into a clean jug (4) wait overnight (5) remove the jug of clean chemistry (6) rinse everything.I don't understand how dripping solution into a clean jug overnight does anything to clean the solution. (By 'solution' I assume this means water + chemicals.)
Can you say more?