Gents,
I removed the blower fan and motor and shoved my hand up inside and sure enough there was something like a concertinered fabric filter. I got the vac and taped a length of 15mm foam pipe insulation to the hose as the bend is too tight for a normal pipe. I then waggled the thing blindly...
I too have a Daughter with a 99 Micra and the air flow from the vents is pathetic even with the heater fan on maximum.
I reved the fan and felt iside and there seems to be a filter or something in the duct work.
I will try to get the hoover in there