Hello,
In your homepage event sheet, write this:
On start of layout
---> AdmobAds: Hide banner ad
When i want to hide ads, mostly i use every tick method. I think with this way even there is 1% to have ads after "On start of layout" (i don't know, mobile issues), "Every tick" is the perfect choice for me. So, write this:
Every tick
---> AdmobAds: Hide banner ad