They don't require a lot of special attention or so many would not have been sold because a lot of us are not meticulous in our cleaning. Wiping them off with a dry rag after cleaning (or using a swab like previously stated) is all they should need.
...same - twirl a solvent soaked Q-Tip over the sights, wipe them off with a dry Q-Tip. The only sight that gets any significant clouding on my gun is the front sight.
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