We installed a drinking water filter/osmosis system that controls the PH level in water. I often use just a damp rag for light cleaning/dusting of the interior for example. Is there a particular PH that would be best for cleaning? The machine has choices for 4.0, 4.5, 7.0 (neutral), 8.0, 8.5, 9.5, 10.0 (alkaline). I've been using 7.0, which is neutral, but wondering if acidic or alkaline would be better. We use 9.5 for drinking per the manufacturers recommendation.