I would simply spray the cleaner with the throttle body in place. The cleaner is flammable and like brake cleaner, it will evaporate. So there isn't any concern about it sitting in the intake runners.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member