To remove old cloud accounts and home networks in the Hue Philips account, navigate to the "Bridge" tab in the Hue Philips account page, scroll down to the bottom of the page and click on the red "Unlink Hue bridge" button, refresh the page, and a green "Add HUE bridge" button should appear, click on the Bridge V2 circle button to connect the Bridge V2, and go to the "Applications" tab and remove all irrelevant networks by pressing the red "deactivate button" for each network.