diff --git a/worldmap.html b/worldmap.html
index fffea46..27c73fc 100644
--- a/worldmap.html
+++ b/worldmap.html
@@ -43,8 +43,8 @@
     </select>
 </div>
 <div class="form-row">
-    <label for="node-input-cluster"><i class="fa fa-gears"></i> Cluster if</label>
-    zoom level is less than <input type="text" id="node-input-cluster" placeholder="13 (0-19)" style="width:80px;">
+    <label for="node-input-cluster"><i class="fa fa-dot-circle-o"></i>Cluster when</label>
+    zoom level is less than <input type="text" id="node-input-cluster" placeholder="0 (0,off - 19)" style="width:100px;">
 </div>
 <div class="form-row">
     <label for="node-input-maxage"><i class="fa fa-clock-o"></i> Max age</label>
diff --git a/worldmap/index.html b/worldmap/index.html
index 92426b4..ab57dac 100644
--- a/worldmap/index.html
+++ b/worldmap/index.html
@@ -129,7 +129,7 @@ var buttons = {};
 var marksIndex = 0;
 var popid = "";
 var menuOpen = false;
-var clusterAt = 13;
+var clusterAt = 0;
 var maxage = 600;   // default max age of icons on map in seconds - cleared after 10 mins
 var baselayername = "OSM grey";     // Default base layer OSM but uniform grey
 var ibmfoot = "&nbsp;&copy; IBM 2015,2019"