As you can see in the photo above, you disconnect the fuel lines that come to and fro the fuel tank.
Remove Fuse Number 28 to disable the intank fuel pump.
Get some hose and put it on the inlet/outlet of the fuel filter and put the other end of the pipes into the tank of cleaning fluid.
Start engine and run the engine at various rev ranges.
Tanks about 30 mins to drink up 1 tin of the stuff.
I had a problem where the engine work rock abit at 3k. Seems alot smoother now.
So fingers crossed, as it mostly does it when cold.