Hello everone.Only have my Zafira (2005 Design DTI 16V Last of the old shape) for a few months.I was wondering does the pollen filter have such a great effect on the heater fan power or is it just the fan ? I have worked out that the filter is behind the glovebox but would like to know if i am wasting my time by changing it. I would be grateful for any advice given as it is taking for ever to clear any mist off the front and side windows THANKS.