diff --git a/clean b/clean
new file mode 100755
index 0000000..3c30e00
--- /dev/null
+++ b/clean
@@ -0,0 +1,5 @@
+#!/bin/sh
+#
+# Clean all the intermediate files.
+
+rm -v administration.log candidature.aux candidature.bcf candidature.blg candidature.log candidature.out candidature.toc enseignement.log recherche.log candidature.run.xml
diff --git a/dossier-notes.org b/dossier-notes.org
index b9bac6c..f8a5596 100644
--- a/dossier-notes.org
+++ b/dossier-notes.org
@@ -29,9 +29,10 @@
 
   1. Ensure =biber= is available, e.g. by running the script
      =guix-env=.
-  2. Run =lualatex candidature.tex= once.
-  3. Run =biber canditature= to update the references.
-  2. Run =lualatex candidature.tex= a second time and a the third time
+  2. Clean all the working files by running the script =clean=.
+  3. Run =lualatex candidature.tex= once.
+  4. Run =biber canditature= to update the references.
+  5. Run =lualatex candidature.tex= a second time and a the third time
      to get all the references right.
 
 * Structure