Really really large slddrw file

Ok, This is going on, this assembly drawing and model was created in Solidwoks 2006, update and save on each version of Solidworks and the SLDDRW file was under 10 meg. Now I had to get into the model to make some changes and now the file is over 86 meg. What going on?  is there a way to purge the file or reduce the file size? A second model and drawing just like the first  model and drawing with more parts and the SLDDRW file is 12 meg.SolidworksDrawings And Detailing