Hi Grizzly, for what its worth, I have cleaned and reoiled my cone-type TTP intake filter element half a dozen times over 20K miles or so, and never had a problem with the MAF.
I have been very impressed that a freshly-cleaned pink filter element becomes blackened after only 500 miles or so. As best as I can tell, the black color is from brake-dust comming off the front brakes and being sucked into the air filter.
Ed