Here is another basic tool for that I always use for retouching,
You need to rotate these tools if a particular one does not work.
For example, if a healing tool does not work well, try the patch tool. If it does not work well, try the clone stamp tool as a last resort. There is no magic button to make it all disappear.
Check this clone tool tutorial, even if you think you know it well.
Even I learnt something new from this tutorial. (It will be worth your time)