H2D camera lens dirty, don't know how to clean

My h2d nozzle camera is dirty, according to the assistant, but I don’t know how to fix it. Any tips would be greatly appreciated!

Clean the lens using a cotton swab dampened with 75% isopropyl alcohol.

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Alright, lemme try… would 65% isopropyl alcohol work?

Yes, that would be fine to use.

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Thanks! worked like a charm.