My second go at a Nozzle Cleaner tool, the first being http://www.thingiverse.com/thing:1041001
The first one was a customizable tool, allowing you to build whatever size you wanted, but I personally found it tricky to print and fragile to use. The primary idea was to provide a surface that would catch on the nozzle. Rather than building it into the model, this time I used the slicer to build 3 solid base layers then 2 layers at 25% infill, thus generating the surface I wanted for cleaning the nozzle from the slicer rather than the model itself.
3 solid base layers
0 solid top layers