Answer: Without seeing the plant in question I can't tell whether the problem is caused by insects or diseases, or even cultural control. Look closely on the undersides of the leaves. You may find insect colonies there who are feeding on the fluids in the leaves. If there are no insects, it might be a disease problem. Either way, I would remove the affected lower leaves to either get rid of the insects or to help stop the spread of disease. Watering every other day might be excessive, even for a plant in a container. Water thoroughly but then allow the top half inch of soil to dry out before watering again. Hope this helps!
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