The only way to clean the intake is foaming and is only a band aid, I did this every 10K miles and still had to replace the intake at 41K miles.
I also stationary de-sooted the SCR and change the lube every time. (WITECH)
The 3.0 in factory OPS and DD use will cake the swirl valves and eventually effect the operation of the truck, the real danger is the intake vales getting cake up if that happens the vehicle will surge badly EGTs will climb to 1500F producing more need EGR to reduce the NOx.
Its like this , hose from rear to mouth, you won't last long ingesting your waste and neither will the 3.0.