diff --git a/lib/app.js b/lib/app.js
index 95ac3dc..79adf6e 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -8,10 +8,12 @@ import presets from './presets';
 import deviceWallFsmFactory from './device-wall-fsm';
 import {UI} from './action-names';
 
-const logger = createLogger();
-const createStoreWithMiddleware = applyMiddleware(logger)(createStore);
+var storeFactory = createStore;
+if (process.env.NODE_ENV !== 'production') {
+    storeFactory = applyMiddleware(createLogger())(storeFactory);
+}
 
-export const store = createStoreWithMiddleware(reducers, {
+export const store = storeFactory(reducers, {
     devices,
     presets,
     pageUrl: null,
diff --git a/lib/components/help.js b/lib/components/help.js
index ffd9811..9a97373 100644
--- a/lib/components/help.js
+++ b/lib/components/help.js
@@ -21,13 +21,13 @@ export default tr.component({
                 </section>
                 <section className={cl('help-column')}>
                     <h3 className={cl('help-title')}>Device Wall</h3>
-                    <p>The Device Wall provides a birds-eye overview of how your web-page may look on different devices. Each view is sized and overrides user-agent according to real device specs.</p>
+                    <p>The Device Wall provides a birds-eye overview of how your web-page may look on different devices. Each view is sized and overrides user-agent according to real device specs and <code>&lt;meta name="viewport"&gt;</code> tag of your page.</p>
                     <p>In this view, hold down <strong>Shift key</strong> to enter <em>control mode</em> (screen edge will glow green). In control mode:</p>
                     <ul className={cl('help-list')}>
                         <li className={cl('help-list-item')}>use mouse wheel to zoom in and out;</li>
                         <li className={cl('help-list-item')}>drag view to pan around.</li>
                     </ul>
-                    <p>If you don’t see glowing screen edge while holding Shift key, click outside device view and try again.</p>
+                    <p>If you don’t see glowing screen edge while holding Shift key, click on gray area outside device view and try again.</p>
                 </section>
             </section>
             <footer className={cl('help-footer')}>