Prevent clear form on Submit

Hi,

I’d like to prevent the form from clearing on Submit.

I tried commenting the “reset” line on contact-form-7/includes/js/scripts.js

if ( 'mail_sent' == data.status ) {
				$form.each( function() {
					//this.reset();
				} );

				wpcf7.toggleSubmit( $form );
			}

and also adding this to the footer

<script type="text/javascript">

        document.addEventListener( 'wpcf7mailsent', function( event ) {
            jQuery(‘.wpcf7’).find(‘form’)[0].reset();
        }, false );
</script>

But the form still clears. Any ideas?

Thank you