I was in town on business travel and had one dress shirt that had some collar dirt that was building up and *many* other cleaners in many different states had told me was impossible to get out. Alberto at Silver Cleaners said that they would dry clean instead of wash and apparently work some other magic. The result is that the shirt is totally clean. This is the best, or one of the best cleaners I have ever used. I wish I had one this good near my home!