Hide Blank Custom Fields on Requests

Using conditional logic in the ticket form means there are a lot of questions with blank responses and I would like to hide these to keep the request view tidy. You can see how this looks today in the image

Based on other feedback I have edited the request_page.hbs and added the following but with no success:

     #indicate that if the field is black then do not display
          {{#each custom_fields}}
          {{#is value "-"}}
          {{else}} 
            <dt>{{title}}</dt>
            <dd>
              {{value}}
            </dd>
          {{/is}} 
          {{/each}}
        </dl>