|
I take the mirror out but leave the mirror in the cell and carefully wash the surface under water (with a couple of drops of detergent) in the sink. Final rinse with distilled water. I mark the orientation of the mirror cell in the ota so it needs very little collimation when re installed.
I have heard some people use their finger tips to wipe the surface in lieu of a soft cloth, the finger tips are apparently softer/ smoother and you can feel any grit that might otherwise scratch the surface.
|