Robin R I was actually thinking about doing the same to my engine...but now I'm kind of afraid :grin2:
How did you program the butterfly or flap?
To clean it properly you need to take it off really.
To do it in situ, I'd recommend having somebody press the throttle pedal whilst you carefully scrub a toothbrush lightly around the opening with a tiny amount of intake cleaner.
1/ DON'T put your fingers in
2/ Don't spray cleaner in, spray a tiny amount on the toothbrush
3/ Be gentle so not to damage the valve or lose bristles down the intake
3/ I cut off the fuel using the interia switch near the driver door to avoid flooding the engine. Not 100% sure if needed but I did anyway.
4/ Don't push valve manually as you can mess with the idle or worse break teeth on the cog and need a new assembly.