In somewhat sealed units, such as an automatic Trans, manual gear box, or front or rear differentials, running the cleaning dose will clean up deposits, suspend into the existing fluid or lubricant and be removed with the drain. In these applications a rinse is not necessary. Merely fill with fresh lubricant and be assured that you drained out a great majority of the contaminants that likely occured during the past service life.
If you are planning an ATF, manual gear lube, power steering fluid change again in 30K, you may consider a maintenance dose for lubricity. Otherwise, I would call it a day and rely on the fresh fluid/lubricant in a cleaned envirnoment to serve you well.