Oh my goodness. Getting ep out of a VersaMark pad is a real bear.
It has been my experience (since I ruined 2 VersaMark pads with dry ep at a class in November) that ep is impossible to completely get out of the VersaMark. Get as much off of it as possible and reink.
You can not rinse out the VersaMark pads like you do the classics. It doesn't work. Been there done that.
Sorry for the bad news.