Bubbles sticking to areas of the tank and not on the surface is completely normal. Just wait until you do your first PWC
. Because the glass is so clean still a biological filter has not developed on the surfaces of the tank (your nitrifying bacteria among other things). Once this is developed you will have a slime coat on the surfaces and you will not see the bubbles stick.
As for the surface this is normally a protein sheen caused by over feeding, disturbing the substrate/filter, or when nearing the end of a cycle when you have a bacterial bloom. Basically leave it alone, it won't cause any problems and should go away on its own, or when you do a water change.