[DRL333]

I am about to purchase a second hand 10 " Mead LX200R. The catch is that the front correction lens has a buildup of dust (outdoor grit I expect) as a result of dirt buildup on dewy nights. It resists a blower brush.

There must come a point in the life of any such instrument where cleaning becomes necesary. How can I clean the correction lense without damaging the lens or coatings?

Any suggestions welcome

Derek