Pick up Tergikleen and only use Distilled water, I use 20 drops into 1 gallon jug of distilled water and just top of the Ultrasonic with a little more distilled till it reaches the line. Old LP's that havn't been pre cleaned I do by themselves. My LP's that was "pre cleaned" with the vinyl vac way I do 2 at a time. This is how I do it and it works great for me. Amazing results.