diff --git a/src/web/WebCustomizationService.cpp b/src/web/WebCustomizationService.cpp
index 65d2403e0..d1068861d 100644
--- a/src/web/WebCustomizationService.cpp
+++ b/src/web/WebCustomizationService.cpp
@@ -369,7 +369,8 @@ void WebCustomizationService::begin() {
 void WebCustomizationService::load_test_data() {
     update([&](WebCustomization & webCustomization) {
         // Temperature sensors
-        webCustomization.sensorCustomizations.clear();
+        webCustomization.sensorCustomizations.clear(); // delete all existing sensors
+
         auto sensor   = SensorCustomization();
         sensor.id     = "01_0203_0405_0607";
         sensor.name   = "test_tempsensor1";