its a long term solution. the iacv was probably stuck and spraying it out cleaned it. if this happens again, just take off the iacv and clean it throughly and it should keep working.
Yes, it's best to clean both the front and back side of the butterfly valve inside the throttle body. One of the pictures in that thread shows the picture of a slotted screwdriver holding the linkage to open up access to the back of that butterfly valve. Take a look at that picture. Just don't stick the screwdriver inside the throttle body itself to hold the butterfly valve open. You don't want to scratch anything inside there.One more question. Does the throttle body need to remain open when spraying the Sea Foam Deep Creep into the hole?