What is the proper way to cleanup juju deployment

Hi All,

I successfully deployed charmed kubeflow and everything is up and running. Now I want to properly remove the whole deployment so that I can respin the same with the new version.

In the past I tried removing juju snap using purge option and it always left cloud/controller/model configurations. As a result I am not able to clean it start new installation properly.

What is the proper way to remove the whole juju deployment even if some of the nodes in the cluster are no more reachable?