have 28G container snapshots under

/var/lib/rancher/rke2/agent/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots

on my k8s cluster nodes. Where can I find documentation about how the cleanup of those files is handled? Should I clean it manually with crt/crictl or is there a built-in mechanism to clean them? In case there is, where can I find the config for this automatic cleanup?