@phenomlab Thanks, do you use HTML widget? ! I will try that and see if Google adsense does not mind not being inside the head tag.

@phenomlab it seems like it kind of works, but the ads are intermittently showing and only on the front page, although I put the widget in the global header. My guess as it's something related to the google adsense code not being inside the head tag. I will keep exploring the option of using custom header and try to figure out how to detect the guest users in javascript.