If you are faced with a blocked DPF and unable to perform a forced regeneration, DPF Genie offers an alternative to using additives. The company based in North London has a special heat treatment oven to clean the system safely. You remove the filter from the vehicle, package it up and the firm has a nationwide collection service so once they have cleaned it, it is returned with a certificate which guarantees it has been thoroughly cleaned. Silicone carbide DPFs are not designed to have fluids pass through them so the company designed a special oven which uses only heat and air to remove build-up, it reaches 700ºC to burn off the blockage within the channels.