Photon46 i came to that same thought after seeing the left over water in my steamer after a cleaning session. It was obvious that the water in your steamer gets residue from the interior of the unit. I was using Nerl lab grade water for my whole routine of steam cleaning. Now i use distilled water in the steamer and use Nerl water for two manual rinses. I also am saving cash not using the expensive lab water in the steamer. With no loss of sound that i can hear from eather way of steaming. I believe the double rinse with ultra pure water makes a marked improvement in the sound of a LP.
Tvad like i just mentioned above another pure water source is NERL Ultra Pure Reagent Grade Water at http://www.nerl.com/product/water.aspx?id=34.
Tvad like i just mentioned above another pure water source is NERL Ultra Pure Reagent Grade Water at http://www.nerl.com/product/water.aspx?id=34.

