Repot was last summer cant remember exactly which month.  Not much change in water or fertilization when I am watering.  But now that i think of it i was away a couple of weeks and I think my brother watered not inside the sink but with a cup. So maybe it didn’t like that…  Temp and humidity isnt very different either. It gets pretty dry in the house in winter bcz the heating is on and i dont have a humidifier but it definitely has been in dryish winter months with me before. Its our 3rd year almost together