diff --git a/src/stations/Graffiti.js b/src/stations/Graffiti.js
index 62f5daf..61d748a 100644
--- a/src/stations/Graffiti.js
+++ b/src/stations/Graffiti.js
@@ -212,7 +212,7 @@ export function setup(ctx, hall) {
         drawContext.strokeStyle = "#0f0";
         var dist = lastPosition.distanceTo(aux2);
         var angle = angleBetween(lastPosition, aux2);
-        let alpha = THREE.Math.clamp(1 - distance, 0, 1);
+        let alpha = THREE.MathUtils.clamp(1 - distance, 0, 1);
 
         drawContext.globalAlpha = alpha;
 
@@ -221,7 +221,7 @@ export function setup(ctx, hall) {
           var _y = lastPosition.y + Math.cos(angle) * i;
           drawContext.save();
           drawContext.translate(_x, _y);
-          let r = THREE.Math.lerp(0.001, 0.2, distance);
+          let r = THREE.MathUtils.lerp(0.001, 0.2, distance);
           drawContext.scale(r, r);
 
           drawContext.rotate((Math.PI * 180) / getRandomInt(0, 180));
diff --git a/src/stations/Paintings.js b/src/stations/Paintings.js
index f3fc04b..bfdcf7f 100644
--- a/src/stations/Paintings.js
+++ b/src/stations/Paintings.js
@@ -118,7 +118,6 @@ function refreshZoomUV(hit) {
   zoom.widget.position.copy(hit.point);
   zoom.widget.position.x -= 0.5 * zoom.animation;
 
-  const uvs = zoom.widget.geometry.faceVertexUvs[0];
   zoom.widget.material.uniforms.zoomPos.value.copy(hit.uv);
   zoom.widget.material.uniforms.zoomAmount.value = ZOOMS[hit.object.userData.paintingId];
 }
diff --git a/src/systems/AreaCheckerSystem.js b/src/systems/AreaCheckerSystem.js
index 51e61c0..77dd81d 100644
--- a/src/systems/AreaCheckerSystem.js
+++ b/src/systems/AreaCheckerSystem.js
@@ -23,9 +23,9 @@ export class AreaCheckerSystem extends System {
         const checker = checkers[j];
         const obj3D = checker.getComponent(Object3D).value;
         if (obj3D.boundingBox.intersectsBox(bboxArea)) {
-          checker.addComponent(AreaInside);
+          if(!checker.hasComponent(AreaInside)) checker.addComponent(AreaInside);
         } else {
-          checker.removeComponent(AreaInside);
+          if(checker.hasComponent(AreaInside)) checker.removeComponent(AreaInside);
         }
       }
     }