How do I resign from being the Group Caretaker?

To remove yourself from being Caretaker for a Group, then Leave the group by clicking on that option in the right hand menu on the groups page, then rejoin the group as a normal member. This will leave the Caretaker role and allow other members (or new members) of the group to consider taking up the position.

Please also consider posting a note in your group to let others know that there is no longer a caretaker for the group, so that they can consider taking up the position.