I have PS 5.5. Blend tool is the teardrop, smudge tool is the hand with the finger. In blending, select that tool and then a brushsize. you want to work in a relatively small area. I use a circular motion with the mouse directly on the area that you want blended. Be careful when working with shadows on the clothing line not to overlap the blend tool onto the clothing. Keep the clothing line sharp. I think you have only one undo selection so every time you let up on the mouse, scrutinize and zoom out and back in before doing more.