diff --git a/libs/leaflet-hotline.js b/libs/leaflet-hotline.js
index ac95604..1684560 100644
--- a/libs/leaflet-hotline.js
+++ b/libs/leaflet-hotline.js
@@ -42,7 +42,7 @@ https://github.com/iosphere/Leaflet.hotline/
             1.0: 'red'
         };
 
-        this._canvas = canvas = typeof canvas === 'string'
+        this._canvas = canvas = ('string' === typeof canvas) 
             ? document.getElementById(canvas)
             : canvas;
 
diff --git a/src/control.js b/src/control.js
index d47218f..e49fbe5 100644
--- a/src/control.js
+++ b/src/control.js
@@ -66,6 +66,7 @@ export const Elevation = L.Control.Elevation = L.Control.extend({
 		if (this._layers)        this._clearLayers(this._layers);
 		if (this._markers)       this._clearLayers(this._markers);
 		if (this._circleMarkers) this._circleMarkers.remove();
+		if (this._hotline)       this._hotline.eachLayer(l => l.options.renderer.remove()); // hotfix for: https://github.com/Raruto/leaflet-elevation/issues/233
 		if (this._hotline)       this._clearLayers(this._hotline);
 
 		this._data      = [];