diff --git a/README.md b/README.md
index 8034a15..0a11063 100644
--- a/README.md
+++ b/README.md
@@ -11,11 +11,6 @@ It creates containers for:
 
 Ports and Passwords are configured in `.env`.
 
-TODOS (There are probably a lot more!):
-* Some of the Volume directories need to be created first.
-* ClusterCockpit is at the moment still using the influxDB V1 API, the InfluxDB container is already V2
-* For a complete demo database setup, InfluxDB data fixtures are missing (MySQL demo database is available)
-
 ## Known Issues
 
 * `docker-compose` installed on Ubuntu (18.04, 20.04) via `apt-get` can not correctly parse `docker-compose.yml` due to version differences. Install latest version of `docker-compose` from https://docs.docker.com/compose/install/ instead.
@@ -63,6 +58,17 @@ If not using an existing database, the fixture data needs to be prepared before
 In `.env`, change the following variables under `APP`
 * `APP_ENVIRONMENT` to `dev`
 
+In case you want to switch from Demo to Develop you have to purge previous images. This command will purge **ALL** your docker images:
+```
+$ docker images -a -q | xargs docker rmi -f
+```
+
+Check with:
+```
+$ docker images
+```
+that all images are gone.
+
 After that from the root of the repository you can start up the containers with (use -d switch to startup in detached mode):
 * `docker-compose -f docker-compose.yml -f docker-compose-dev.yml up`
 * Wait... and wait a little longer