Matt, glad to be of assistance, yeah amazing what dust can do, don't forget those bearings etc are made to a very fine tolerance, so a speck of dust is like a hunking great boulder
You're far better off using something like this than compressed air, also check no cables or such like are fouling the fans
IT Dusters CompuCleaner Xpert - Electric Air Duster Blower for PC, Laptop, Console, electronics and Home Cleaning, environmental alternative to spray air can duster...
There's a bloke on here called Buster, who keeps sending me loads and loads of Videos of the 1970's group, "The Sweet".
Does anyone know a Way..???
There's got to be a Way,
To Block Buster.😂