If you are removing them, no need to clean them internally. By all means, keep them clean when out, and clean them externally. Before removal, blow out the areas around them with compressed air. No need to replace the o-rings, as they are specific to these units, but are available online.
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582, 682, 782, 782D, 1282, 1050, 1210 x 2, 1711, and 1811
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