Jobo increased the recommended agitation in their "Journal of Rotary Processing" some time back. The problem is not one of getting rid of the developer, it is stopping development. If you use a rinse at 100F, you don't stop development properly. Only a stop can do that.

There are 2 letter marked indicators on the speed dial. Use the higher setting. Then you might not need the rinse or stop. However, this is an expensive test method.

You should also be using Bleach III which is more acidic and you have to pour it in fast.