Since purchasing my cleaner early 2010 I had not changed the filter! And the brand said: An air cleaned up 99.99%. Optimizes suction power. To protect the motor. To change every year This still depends on its use. Simple to: remove the hose, open the lid, remove the dust bag, remove the old filter and fit the new instead. I wrote the date on the filter change, but really the old was not very dirty. Damage to change everything, if it were not locked up and we could brush the because like any original part that is expensive, still a tax of more than 1 month to which must be added the price of the bags. I do not change every year, I have less dust to do now. The new filter will give him more power, as it is written.
