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Taking off the throttle body?

Newby owner with Passat but with other cars.... never removed the throttle body from the car to clean it. Just used throttle body cleaner in a spray can (with a small squirt straw), an old soft toothbrush (with a long handle), and lots of clean rags. Usually just hold the throttle open by hand to clean the backside of the butterfly and venturi area.

Is there some reason you can't clean the throttle body in-situ on the Passat?

Also concerned about having to use Vag-Com to reset the Throttle body after cleaning (don't have access to one). Does this happen every time?... Would it happen if you clean it but didn't remove? Afraid to clean it if I am going to have to take it to the dealer to get the codes reset.
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