diff --git a/changelog.txt b/changelog.txt
index 08023eaa..27c5e976 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -3,6 +3,8 @@ OPENSEADRAGON CHANGELOG
 
 5.0.1: (in progress...)
 
+* Fixed: If you switched from WebGL drawer to canvas drawer, it didn't clean up properly (#2570 @pearcetm)
+
 5.0.0:
 
 * BREAKING CHANGE: Dropped support for IE11 (#2300, #2361, #2553 @AndrewADev, @msalsbery)
diff --git a/src/webgldrawer.js b/src/webgldrawer.js
index e3896deb..23266347 100644
--- a/src/webgldrawer.js
+++ b/src/webgldrawer.js
@@ -822,8 +822,8 @@
             this._renderingCanvas.height = this._clippingCanvas.height = this._outputCanvas.height;
 
             this._gl = this._renderingCanvas.getContext('webgl');
-            //make the additional canvas elements mirror size changes to the output canvas
-            this.viewer.addHandler("resize", function(){
+
+            this._resizeHandler = function(){
 
                 if(_this._outputCanvas !== _this.viewer.drawer.canvas){
                     _this._outputCanvas.style.width = _this.viewer.drawer.canvas.clientWidth + 'px';
@@ -844,7 +844,10 @@
 
                 // important - update the size of the rendering viewport!
                 _this._resizeRenderer();
-            });
+            };
+
+            //make the additional canvas elements mirror size changes to the output canvas
+            this.viewer.addHandler("resize", this._resizeHandler);
         }
 
         _setupTextureHandlers(thisType) {