diff --git a/src/alpine_bits_python/alpine_bits_helpers.py b/src/alpine_bits_python/alpine_bits_helpers.py
index cb5ef99..a9641d3 100644
--- a/src/alpine_bits_python/alpine_bits_helpers.py
+++ b/src/alpine_bits_python/alpine_bits_helpers.py
@@ -744,7 +744,7 @@ def create_xml_from_db(list: list[Tuple[Reservation, Customer]]):
             klick_id = reservation.fbclid or reservation.gclid
 
             
-
+            # explicitly set klick_id to None otherwise an empty string will be sent
             if klick_id in (None, "", "None"):
                 klick_id = None
             else: # extract string from Column object