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I do the same as Phil but i brought some of the Dr Clays mix {sold as UTHC cleaner} from Bintel.As for technique i use a blower brush first , then a gentle brush with one of those lens pens-one direction -{they have a camel hair brush and cleaning pad at either end} then if the eyepiece lens requires further cleaning i use a cotton pad/swab dampened with the UTHC cleaner via a little pump spray bottle-one direction again-.A barlow is going to be a little bit more tricky
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