Clone tool in photoshop

[tegan]

I find when I use to clone tool on white objects like a white line in football field, there are remnants of the white line left around. It isn't so visible until you zoom in close.
Is there a solution to this that anyone knows of.

There are a number of possibilities: Opacity not set at 100%, Mode not set at Normal, the wrong brush settings: too small, too soft, insufficiently dense pattern, problems in the area that you are cloning from, etc.

Tegan