PHP XML reader not finding node with hyphen

I have the following PHP which works exactly as it should and finds all 'Widgets' in my xml document:

  if($reader->nodeType == XMLREADER::ELEMENT && $reader->localName == 'manufacturer'){
     $reader->read();
       if($reader->value == 'Widget'){
          echo 'congrats you have found the widget';
       }

But when I try the following, I get no results, and I know "blue-widget" to exist several times in the xml document in the manufacturer node:

  if($reader->nodeType == XMLREADER::ELEMENT && $reader->localName == 'manufacturer'){
     $reader->read();
       if($reader->value == 'blue-widget'){
          echo 'congrats you have found the widget';
       }

Does this have something to do with the hyphen in the manufacturer name? I also cannot seem to find the "blue-widget" by any other attribute, yet any other named product I try to extract can be found just find. Its as if XML Reader is not seeing the product nodes that contain "blue-widget".