If you want to wipe your Kubernetes cluster and start from scratch (e.g. if your cluster was put into a bad state), you can run the following command:
ansible-playbook -i inventory/<CLUSTER_NAME>/hosts.yaml --become --become-user=root -u <SSH_USER> reset.yml
If your cluster is registered with SLATE, ensure you delete the cluster from SLATE first by using slate cluster delete <CLUSTER_NAME>.