[iceman (Mike)]

Yesterday I took the mirror out of my 12" scope to wash it, and usually after rinsing with demineralised water, only a small amount of large droplets are left on the mirror, while the rest dries very quickly. The large droplets I then just dab dry.

Yesterday, I found that even while washing it, and then again when I set it to dry (after rinsing with demineralised water), the water was beading almost in rows and after rinsing, most of it still stayed on the mirror and didn't dry quickly like normal.

See attached pics.

Something wrong with my coating?