diff --git a/src/botControls.js b/src/botControls.js
index d901b2f6..b4649ac3 100644
--- a/src/botControls.js
+++ b/src/botControls.js
@@ -116,6 +116,7 @@ document.addEventListener('keydown', (e) => {
           break
         case 'KeyS':
           bot.setControlState('back', true)
+          e.preventDefault()
           break
         case 'KeyW':
           bot.setControlState('forward', true)
diff --git a/src/index.js b/src/index.js
index 3060c370..cf402cf2 100644
--- a/src/index.js
+++ b/src/index.js
@@ -111,7 +111,7 @@ const minPitch = -0.5 * Math.PI
 
 // Create three.js context, add to page
 const renderer = new THREE.WebGLRenderer()
-renderer.setPixelRatio(window.devicePixelRatio || 1)
+renderer.setPixelRatio(window.devicePixelRatio || 1) // todo this value is too high on ios, need to check, probably we should use avg, also need to make it configurable
 renderer.setSize(window.innerWidth, window.innerHeight)
 document.body.appendChild(renderer.domElement)
 
@@ -646,7 +646,7 @@ window.addEventListener('keydown', (e) => {
     e.preventDefault()
     goFullscreen(true)
   }
-  if (e.code === 'KeyL') {
+  if (e.code === 'KeyL' && e.altKey) {
     console.clear()
   }
   // if (e.code === 'KeyD') {