As regards arm & a leg costs of so called (IPA) MAF cleaners, I have found them to be a waste of time with the MAFs of all four of my K11 micras that suffered the same notorious fate in the last 17 years of owning & driving them.
The only one I was economically able to fix was the Bosch TB with its detachable & thus replaceable MAF at an economic viable cost.
Sometimes its more efficient to do only the right minimal work & avoid doing unnecessary uneconomic work & quickly move on. 
