Moved from Cloud forum to Photoshop forum
Content Aware Fill (CAF) is a great feature, but sometimes it needs a bit of help. Make your selection as tight as you can to the area you want to remove. A good way to do this is to use Quick select tool with Select > Modify > Expand
But CAF can still get it wrong, using source pixels you don't want in the fill - like putting a persons head in the sky! To prevent this happening make a rough selection that includes the area you want to remove, plus the areas you want used in the fill. Copy that to a new layer, and use CAF on that layer.