You can use Weld modifiers to clean up close or overlapping Vertexes, but they are not clean.
Or you can use a remesh…
All automation methods are flawed, and I think the way to organize them perfectly is by hand. 
You can use Weld modifiers to clean up close or overlapping Vertexes, but they are not clean.
Or you can use a remesh…
All automation methods are flawed, and I think the way to organize them perfectly is by hand.