Hi Chris, there are basically 3 clone methods. The first obvious one is the clone stamp tool. Usually you need to make sure to set the hardness of the stamp is set to 0, so that edges are not visible: that is what went wrong here. The second one is the patch tool: select the area you want to fix and drag it what you want it to look: very useful for small corrections. The third one is the quickmask method (APTATS, Robert O'Tool): select Quick Mask mode, select the brush, set opacity to 75-100% and mark the area you wish to copy. Ctrl-C and V and use the move tool (V) to move the selection to the area to be corrected.