In the past, when I have an excited child that will not stay in the carboy, I just add a funnel and a piece of plastic or aluminum foil on top of the funnel to act as a buffer zone. This makes me wonder if the extra foam is because of the residual Star San HB left in the container.
The direction state to let dry (Local state health departments may require a potable water rinse after using all chemicals.)
Star San HB contains Phosphoric Aid and Dodecylbensensulfonic acid. I need better eye glasses
The acids don't bother me, but it is interesting that the froth is out of control and is very white in nature.....The next thing is head retention of the foam in the finished beer.. This is a dry stout that I really like but has bad head retention.
The fun of it all!