Please recommend a mildly acidic cleanser that is good for morning and evening use.

Perhaps because I have been taking swimming lessons for a long time, I try switching between various cleansing products morning and evening. As a result, my skin has become sensitive, so I would like to get a recommendation for a mild, slightly acidic cleanser. I also want to use a product that is less irritating to the skin. I suspect this might be due to the frequent contact with water from swimming for so long. Please recommend a good cleanser.