I am ridiculously proud of myself.
I have disassembled and cleaned my bathroom extractor fan. And put it back and.....................
IT BLOODY WORKS!
I was mindful of the small motor and delicate circuitry. I followed the instructions carefully, and eschewed the dishwasher for the 'slightly damp cloth and soft brush' option.
I would like to thank Woolworths (RIP) for cheapo soft paintbrushes, and that old pyjama top I ripped up for cleaning rags.
I feel like Handy Farking Andy.
I will now dispense DIY advice for those of you lacking in my, er, fan prowess. Unless, um, actually everyone in the world can do this and this is the dullest mn thread ever. Which it probably is. 
But I am still going to celebrate with a nice cup of tea and a 