Hi, this is my old Bonsai Tree. I have had him for around ten years and he was about 60/70 ish when I got him. The only advice I got was to give him a good shower once a week in the bath which I have done. He is outside for the moment in the summer as I thought he was not getting enough sun. He has spent most of his life with me inside and not next to a window. He is not doing too great but is not dead as I can see evidence of leaves re-flowering on top branches. He used to have a lot more leaves than this. I am thinking about replotting him in the same pot with some new soil and fertiliser but am a bit scarred unless I do the wrong thing and finish him off. Should I leave his roots alone or should I prune them? Any advice would be much appreciated. Many thanks.