Not much, really.  Honestly, one of my favorite feelings after a good play session (besides the soreness) ... that continual slick, wet oozing sensation after getting my hole seriously fisted or punched for that matter.

Think about it ... you introduced a lot of thick, slick lube, then opened yourself up, and you are totally relaxed back there ... you need time to close back up, and at the same time, what went in has to come back out.  Some lubes take longer that others.  Flushing out would be the worst thing to do.  After just having 'abused' yourself, you could actually irritate things more.

Do what I do ... double up on my underwear and accept the fact that you may need one or two changes.  ~f