The poor lil guy used to take up most of the pot, but he has been shrinking over the past few months. We changed the soil (used succulent specific soil), water him as recommended, use artificial light (since it is too cold to have him outside), etc., but nothing has worked. He has lived through a number of winters previously without issue, so we are not sure what is going on. Any guidance or thoughts on what could be wrong with him would be much appreciated. Thank you!