With the plants in there, the terrarium seems quite the little ecosystem. How often do I strip the tank right down and clean it top to bottom or is that necessary? I need to get more detailed info on spot cleaning and maintaining the ecosystem properly. I've not seen any specific "do this once a week, do this every day, do this every two weeks" in my internet travels.

I've read on this site till my eyes bled, back to 2009 in a lot of cases, but it seems that this is one of those "general knowledge" things that everyone knows so nobody elaborates on.

Care to elaborate?