This alone is the work i always want to avoid.. cleaning the corrector plate of C14 telescope. It always damages the coatings of the optics, ever so slightly but nevertheless i have to do it after a couple of years or so.

It is not at all easy to find 95% isopropyl alcohal in my city; there is only one place that i eventually found this in Lahore.

Distilled water, isopropyl alcohal and surgical cotton is all i need to do the cleaning process.. look at the difference now.. Telescope is happy now :)