Cleaning Ionizing Wires
Honeywell recommends wiping down the ionizing wires when washing the collector cells. Also check the wires for roughness, a side effect of the corona discharge is the growth of a white quartz layer.
Air near the high-voltage ionizer wires breaks down in to ions and high energy electrons. This mixture of ions and electrons is called the corona plasma. The ions collide with suspended particulate and confer the charge.
The plasma has an unintended reaction with cyclomethicone, a silicone oil present in household products such as deodorant sprays and skin lotions. This reaction leaves deposits of solid silicon dioxide on the ionizing wires. These insulating formations will significantly suppress the corona pattern and intensity.
Research has shown cleaning the wires with 600 grit emery cloth will remove the silicon dioxide, but at the risk of damaging the wire surface or breaking the wire.