Clone and Heal Tool
Finding that even with Opacity at 100% and Feather too, that far too often the feature doesn't work properly and leaves smudges or doesn't cover the object completely. Wanted to cover up blue bird ring and had many goes but couldn't get a good result or for it to be covered up. I had to leave it as it was as this was better than the Heal. Not the first time that I find that the Clone or Heal is in need of improvement.