diff --git a/packages/gatsby-theme-carbon/src/components/Header/Header.js b/packages/gatsby-theme-carbon/src/components/Header/Header.js
index c61ac5fb0..480121660 100644
--- a/packages/gatsby-theme-carbon/src/components/Header/Header.js
+++ b/packages/gatsby-theme-carbon/src/components/Header/Header.js
@@ -40,7 +40,10 @@ const Header = ({ children, shouldHideHeader }) => {
         <HeaderMenuButton
           className="bx--header__action--menu"
           aria-label="Open menu"
-          onClick={() => toggleNavState('leftNavIsOpen')}
+          onClick={() => {
+            toggleNavState('leftNavIsOpen');
+            toggleNavState('switcherIsOpen', 'close');
+          }}
           isActive={leftNavIsOpen}
         />
         <HeaderName prefix="" to="/" element={Link}>
@@ -54,6 +57,7 @@ const Header = ({ children, shouldHideHeader }) => {
             onClick={() => {
               toggleNavState('switcherIsOpen');
               toggleNavState('searchIsOpen', 'close');
+              toggleNavState('leftNavIsOpen', 'close');
             }}
           >
             {switcherIsOpen ? <Close20 /> : <AppSwitcher20 />}
diff --git a/packages/gatsby-theme-carbon/src/components/shared/responsiveStyles.js b/packages/gatsby-theme-carbon/src/components/shared/responsiveStyles.js
index 8d5d596f0..1f6873638 100644
--- a/packages/gatsby-theme-carbon/src/components/shared/responsiveStyles.js
+++ b/packages/gatsby-theme-carbon/src/components/shared/responsiveStyles.js
@@ -2,7 +2,6 @@ import mediaqueries from '../../util/media-queries';
 
 const responsiveStyles = {
   width: '100%',
-  //padding: '0 1rem',
   [mediaqueries.md]: {
     width: '75%',
   },
diff --git a/packages/gatsby-theme-carbon/src/util/hooks/useWindowSize.js b/packages/gatsby-theme-carbon/src/util/hooks/useWindowSize.js
index 83f13de2e..85428bae1 100644
--- a/packages/gatsby-theme-carbon/src/util/hooks/useWindowSize.js
+++ b/packages/gatsby-theme-carbon/src/util/hooks/useWindowSize.js
@@ -1,4 +1,5 @@
 import { useState, useEffect } from 'react';
+import { throttle as _throttle } from 'lodash';
 
 const initialValue = {
   innerWidth: null,
@@ -10,20 +11,20 @@ const initialValue = {
 function useWindowSize() {
   const [windowSize, setWindowSize] = useState(initialValue);
 
-  function fetchWindowDimensionsAndSave() {
+  const fetchWindowDimensionsAndSave = _throttle(() => {
     setWindowSize({
       innerHeight: window.innerHeight,
       innerWidth: window.innerWidth,
       outerHeight: window.outerHeight,
       outerWidth: window.outerWidth,
     });
-  }
+  }, 100);
 
   // run on mount
   useEffect(() => {
     // run only once
     fetchWindowDimensionsAndSave();
-  }, []);
+  }, [fetchWindowDimensionsAndSave]);
 
   // set resize handler once on mount and clean before unmount
   useEffect(() => {
@@ -31,7 +32,7 @@ function useWindowSize() {
     return () => {
       window.removeEventListener('resize', fetchWindowDimensionsAndSave);
     };
-  }, []);
+  }, [fetchWindowDimensionsAndSave]);
 
   return windowSize;
 }