How to Clean EGR Valve OPEL MERIVA 1.3 CDTI 2006

Hi all, just to let you know this is a nightmare to do.
Disconect battery and remove the tray, this is all the room you get.
Remove winscreen cowl and wipers also rubber seal.
Remove air hose connecting from intercooling to inlet manifold.
Remove water pipes to heater, both ends you need the room.
Now you can check the top half of it? undo the electric, remove three screws and take off the black ribbed or finned solinoid. press in the end its spring loaded and check it moves freely.
look into the hole left behind it should look as clean as new, press it, it works acts and looks like a thermostat. If it does go up and down freely, stuff the rest and put it back together.
It was just a pure delight to remove the 4 bolts below and find out that there was hardly any carbon to clean. I joke but if you want to try it be my guest.
You use every trick you know, then run out and then make some more up to complete.