Sensu-InfluxDB-Grafana shows stale hosts/clients on variable list

I’m currently implementing Sensu 1.5 + InfluxDB 1.6 + Grafana 5.0

Action:
I delete a client/host from Sensu

Expected:
The client is removed from Influxdb so it also removes itself from Grafana variable list.

Observations:
I can see stale clients on my variable list. Since we’re working around auto scaling, this list builds up soon. How can I purge stale clients from InfluxDB