Reply to 1st message: TD was in one of the corners.
Reply to 2nd message: Not sure I can do anything about tint film. Apartment complex applied it. From other research, said cacti/succulents should be 3ft from regular windows so I figured window sill was ok for these due to tint film. Stem is fine. Leaves just started to slowly wither at first, then it picked up. Plant still firmly rooted. Was watering based on what I had read. Let top layer of soil dry, then water thoroughly. Drainage holes in bottom of pot.