When spraying the TB cleaner inside the TB, I HIGHLY recommend that you hold the TB with the electronic control module portion of the TB ABOVE the body of the TB. Orienting the TB in this manner while cleaning it will help prevent the cleaner from leaking past the seals between the TB body and control module and possibly damaging it. While the seals should be a sufficient barrier to this happening, why take the chance with a $500 piece of equipment.
Prior to reinstalling the TB, make sure to let it dry thoroughly or damage to the electronic control module or throttle position sensors may result. To speed up the process, I inserted clean strips of paper into the gap between the edge of the throttle valve and TB wall to remove the cleaner held in there by capillary forces. Following this, I allowed to the TB to sit for approximately 30 mins before reinstalling it. I recommend that you wait this long or more before reinstalling your TB.