Could someone shed some light on this one. I think I should be cleaning my ITG filter soon too, had it a while now looks clean enough but you can imagine the dust in there. I used to clean my Kwak filter 'which was quite good' with brake cleaner and then the excess would come out all crappy. The itg is too big for that so shaz's kerosene jobbie seems about right. Isn't shaz a Yank though ? Do they call petrol, kerosene ? Or is that Gas? You can see the need for clarification here. Weeksy, when you bought the filter it should have had a can of special dust retention spray with it. If not you should be able to pick one up at a dealer or tuning house. Wonder if there's an alternative to that too...