We have a garage found our way that I take a few Into and he's got the latest machine that'll clean out any dpf no matter how clogged, took a zafira in there that 2 places wanted to change the dpf and they tried it with their machine, he has some new type of machine only one in the country at the mo he says and that cleaned it out. He's so busy with it now that he's had to take on an extra member of staff just to run that service as the rest of the garage was suffering they were spending so much time doing them. Think he charges £250 which considering the price of a dpf isn't bad really