I use the straw in the chamber method as well. Just a 1 second squirt and it expands out of the muzzle. Hold for a couple of seconds with the straw until it quits expanding and remove straw. Tip barrel slightly down and allow to work. 1 hour later run a couple of patches and your golden. I will say that I do use the accelerator and it seems to remove the carbon quite well and the foam takes care of the rest.
