diff --git a/monkey_island/cc/ui/src/components/pages/StartOverPage.js b/monkey_island/cc/ui/src/components/pages/StartOverPage.js
index 6ecb2cc69..0152c9b61 100644
--- a/monkey_island/cc/ui/src/components/pages/StartOverPage.js
+++ b/monkey_island/cc/ui/src/components/pages/StartOverPage.js
@@ -1,19 +1,71 @@
 import React from 'react';
 import {Col} from 'react-bootstrap';
 import {Link} from 'react-router-dom';
+import {ModalContainer, ModalDialog} from 'react-modal-dialog';
 
 class StartOverPageComponent extends React.Component {
   constructor(props) {
     super(props);
 
     this.state = {
-      cleaned: false
+      cleaned: false,
+      showCleanDialog: false,
+      allMonkeysAreDead: false
     };
   }
 
+  updateMonkeysRunning = () => {
+    fetch('/api')
+      .then(res => res.json())
+      .then(res => {
+        // This check is used to prevent unnecessary re-rendering
+        this.setState({
+          allMonkeysAreDead: (!res['completed_steps']['run_monkey']) || (res['completed_steps']['infection_done'])
+        });
+      });
+  };
+
+  renderCleanDialogModal = () => {
+    if (!this.state.showCleanDialog) {
+      return <div />
+    }
+
+    return (
+      <ModalContainer onClose={() => this.setState({showCleanDialog: false})}>
+        <ModalDialog onClose={() => this.setState({showCleanDialog: false})}>
+          <h1>Reset environment</h1>
+          <p style={{'fontSize': '1.2em', 'marginBottom': '2em'}}>
+            Are you sure you want to reset the environment?
+          </p>
+          {
+            !this.state.allMonkeysAreDead ?
+              <div className="alert alert-warning">
+                <i className="glyphicon glyphicon-warning-sign" style={{'marginRight': '5px'}}/>
+                Some monkeys are still running. It's advised to kill all monkeys before resetting.
+              </div>
+              :
+              <div />
+          }
+          <button type="button" className="btn btn-danger btn-lg" style={{margin: '5px'}}
+                  onClick={() => {
+                    this.cleanup();
+                    this.setState({showCleanDialog: false});
+                  }}>
+            Reset environment
+          </button>
+          <button type="button" className="btn btn-success btn-lg" style={{margin: '5px'}}
+                  onClick={() => this.setState({showCleanDialog: false})}>
+            Cancel
+          </button>
+        </ModalDialog>
+      </ModalContainer>
+    )
+  };
+
   render() {
     return (
       <Col xs={8}>
+        {this.renderCleanDialogModal()}
         <h1 className="page-title">Start Over</h1>
         <div style={{'fontSize': '1.2em'}}>
           <p>
@@ -23,19 +75,26 @@ class StartOverPageComponent extends React.Component {
           <p>
             After that you could go back to the <Link to="/run-monkey">Run Monkey</Link> page to start new infections.
           </p>
-          <p>
-            <a onClick={this.cleanup} className="btn btn-danger btn-lg">Reset Environment</a>
+          <p style={{margin: '20px'}}>
+            <button className="btn btn-danger btn-lg center-block"
+                    onClick={() => {
+                      this.setState({showCleanDialog: true});
+                      this.updateMonkeysRunning();}
+                    }>
+              Reset Environment
+            </button>
           </p>
+          <div className="alert alert-info">
+            <i className="glyphicon glyphicon-info-sign" style={{'marginRight': '5px'}}/>
+            You can continue and <Link to="/run-monkey">Run More Monkeys</Link> as you wish,
+            and see the results on the <Link to="/infection/map">Infection Map</Link> without deleting anything.
+          </div>
           { this.state.cleaned ?
             <div className="alert alert-success">
               <i className="glyphicon glyphicon-ok-sign" style={{'marginRight': '5px'}}/>
               Environment was reset successfully
             </div>
             : ''}
-          <p>
-            * BTW you can just continue and <Link to="/run-monkey">run more monkeys</Link> as you wish,
-            and see the results on the <Link to="/infection/map">Infection Map</Link> without deleting anything.
-          </p>
         </div>
       </Col>
     );