1. First, Take Care of DESKTOP View
Make sure everything looks good in Desktop view before you proceed to clean up for Tablet and Mobile view. Why so?
XTOPIA works in a way as you adjust the settings in Desktop, it'll automatically adjust for Tablet and Mobile which we call it "Responsive", but not applicable the other way round. Therefore, it's important to ensure most of the settings are done properly in Desktop view first.
Of course, there's no perfection, you can always go back and adjust little little things that you feel it's not right later on.