Board Thread:Support Requests - Getting Technical/@comment-30622586-20170509102642

I'm trying to change the hover dropdown background color on my wiki's top nav of what I presume is the default grey to none. Problem is I can't find the place where I have to edit.

Here's my css settings: http://uberdrink.wikia.com/wiki/MediaWiki:TopNav.css?action=edit

Here's the test page: http://uberdrink.wikia.com/wiki/Uberdrink_Wiki

Notice I am able to alter the default a:hover but strangly it doesn't work on the 3rd subnav. I'm completely stumpeed. Thanks in advance. 