It sounds like a CSS issue. The most efficient way is to add a CSS to your theme whose `media` type is `print` (see below for example).

Assuming the part you want to hide is an element (`div`, `span`, etc) whose class is `mycustomclass`, inside that stylesheet you could add something like this.

    .mycustomclass {
      display: none;
      visibility: hidden;
    }

And this is the example mentioned above.

    <link type="text/css" rel="stylesheet" href="http://www.example.com/sites/all/themes/mytheme/print.css" media="print" />