[ausastronomer (John Bambury)]

Originally Posted by dreamstation

I'm really at a loss as to what the 'film' of residue left on the glass is or where it came from. It's either come out of the alcohol which I thought was highly unlikely or it's the original drop of residue spread all over the glass..? Maybe I should give it another going over to see if it comes off. I'm scared!



Thanks for the suggestion. I'll have a read!

Hi James,

Did you use cotton buds or cotton balls? Cause if you used cotton balls I can tell you straight away what the residue is

Cheers,
John B