I sent an email to Five Star support and will repost what they respond.
Five Star responded with "If you use Saniclean at 1oz per 3g water, you do not need to rinse, you just let air dry. It just a low foaming version of Star San. Let me know if you have any more questions. Cheers!"
My follow up question was "If air drying will only concentrate the product, what would be the concern with draining and using the sanitized part?"
And their response to that was "There is no concern with that."