i used to own another car with a DBW system(gti) and i found this procedure very useful.
first, get a can of this:
with DBW systems its important not to move the plate because the system can only adapt to so much change in the positioning .
so you can use some qtips and some folded stips of paper or napkins to clean around and through the blade. this prevents any unwanted movement of the blade itself.
below is a procedure for and GTi, but since most DBW throttle bodies are the same, this could be used here.
throttle body cleaning