Cleaning the 12v Omni Electric Fan/Extractor

Since owning my motorhome this is the second time I have done this, the last time was 2 years ago so he has had a fair bit of use in that time mainly in europe & especially spain where it is very dusty.
I did a partial strip down so as to access the fan motor & blade, you do this by removing all surface screws on the inside& removing the switchgear, knobs etc...using soapy water & an old chamois I cleaned all the plastic parts.
Now you can spray wd40 on all the electrics & I then used some engine oil to lubricate all the metal moving parts, I also soaked all the screws in some engine oil for the threads etc...
Now to the outside on the roofI did the same.
Job done