diff --git a/static/scripts/websocket.js b/static/scripts/websocket.js
index 8105435..1ec5041 100644
--- a/static/scripts/websocket.js
+++ b/static/scripts/websocket.js
@@ -207,6 +207,9 @@ window.addEventListener("load", function(evt) {
     };
 
     document.getElementById("replaystarten").onclick = function(evt) {
+        emptyTCP.features[0].geometry.coordinates = []
+        emptySERIAL.features[0].geometry.coordinates = []
+
         let sel = document.getElementById("meas")
         console.log(trackings[sel.selectedIndex].UUID)
         fetch(`http://localhost:3011/trackings/${trackings[sel.selectedIndex].UUID}?replay=true`, { method: 'GET'}).then(results => {