How often does the soil go dry? Are you just going by surface moisture or are you figuring out what's happening at depth?
If the soil seems to take a long time to dry out, consider increasing the exposure. More light will drive more evaporation, and indoors the more natural light the better for the plant itself.
Aeoniums do go through an annual cycle of growth (fall through spring) and rest (summer), if not in an absolute sense. You should expect your plant to have smaller rosettes with fewer leaves in summer, and that's typically associated with the shedding of old dry leaves. This effect should be temporary if it's just seasonal, reversing in the fall. Let's try to work out the watering, though, because that could also explain what you're observing. One thing to avoid is to "treat" the plant for its summer blues by giving it more water... excess water during summer is not a good idea with this genus. More about Aeoniums here:
The Aeoniums Database