JQuery Как изменить класс для каждой строки данных таблицы?

$('tr').each(function() {
  var rowCol = $(this);
  rowCol.find('td:eq(4)').each(function() {
    var mytd = $(this);
    var rowValue = parseFloat($(this).text());
    console.info(rowValue === 0)
    if (rowValue > 1) {
      mytd.addClass('def').removeClass('defects');
    } else {
      mytd.addClass('defects').removeClass('def');
    }
  });
});

.defects {
  background: #e74c3c;
  color: #fff;
  padding: 3px;
  border-radius: 6px;
}

<script src = "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
    <td>0</td>
    <td>6</td>
  </tr>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <td>4</td>
    <td>5</td>
    <td>6</td>
  </tr>
</table>