Answer: Based on your description I would suspect spider mites, especially if there is also fine webbing under the leaves. The mites can be controlled with applications of insecticidal soap according to the label instructions (be sure to cover all leaf surfaces), or can be washed off by spraying the plant with a fairly strong stream of water. Misting the plant can also help lower the spider mite population because they thrive in hot and dry encironments. It is also possible that the plant has outgrown its pot and needs to be divided.
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