Problems with the drop down menu on the iPhone

Create a Child Theme and put this in your Child Theme stylesheet:

@media screen and (max-width: 620px) {

 #branding #mainnav ul ul a {
  display: block;
 }

 .children {
  top: 29px;
 }

}

Your subpage will create a horizontal scrollbar as it is too wide to fit within the small screen. This may have been why, by default the submenu is hidden.

Yes, it works!
Thanks a lot!