Hold down the Alt key and click
This doesn't work.
Try resetting the tool..
To do that, on the clone stamp options bar, look for a box with lines in it on the right. Click on it and reset. That may fix it.
If the problem persists, go to Edit>Preferences>General, and reset preferences to default on next launch.
HELP HELP I'm having the same problem but when i try to use the "healing brush tool" how do i fix it, I get the
Option-click to define a source point to be used to repair the image.
HOW DO YOU TURN THE "OPTION-CLICK" Feature off? At one time, i only had to use it for the clone tool, now for some odd reason its making me do it for eveert tool I use.