diff --git a/.emacs.d/init.el b/.emacs.d/init.el
index 5eddade0..ddd66885 100644
--- a/.emacs.d/init.el
+++ b/.emacs.d/init.el
@@ -33,6 +33,8 @@
 
 ;;; Move user-emacs-directory so that user files don't mix with cache files.
 (setq user-emacs-directory "~/.cache/emacs/")
+;; To start an Emacs with "clean" user files, set this variable to a new location.
+;; (setq user-emacs-directory "~/fosdem/emacs/")
 
 ;; Tor / Proxy: set up before package initialization.
 (require 'functions)                    ; Needed for `ambrevar/toggle-proxy'.