And that's fine, you started the abuse remember? I'll bet the DPF light will come on again but will you be brave enough to say so & eat humble pie? The whole DPF thing is a failure... there to please the Tree hugging greenies & Government desire to lead the Green revolution. The Peugeot system works well, but needs an additive at Service time.
If adding a ring of magnets to a car fuel line was as brilliant as stated, dont you think that major car manufacturers would fit them as standard rather than other expensive clean up systems?
By the way... Googling the product you mention comes up with plenty results but absolutely nothing for the product you describe...
They (Ford and General Motors) did use it in the 70t's until 1974 first petrol crash. The RHP system is actually improving your combustion and burning off the carbon deposit. Simple. Your engine stay clean as new.