diff --git a/maintenance.md b/maintenance.md
index 1d22ac6..8a9bbd1 100644
--- a/maintenance.md
+++ b/maintenance.md
@@ -48,3 +48,4 @@ Newest entries at the bottom.
 - 2026-10-06: Water recycling filters replaced.
 - 2026-10-06: Debugging duck accounted for.
 - 2026-10-07: Oxygen scrubbers replaced.
+- 2026-10-07: Coffee machine descaled.