Pull both out together. It is more of a sandwich. The goo leaks out around the whole perimeter of the mat. I would wear some cheap vinyl gloves .to take them out and place them on cardboard so as not to get the goo on anything else. This is a known problem and not unusual at all. Aftermarket carpets are available. You can clean the goo off the footwell with whatever cleaner you like. I prefer lighter fluid, then wash residue off with soapy water. Exoticare, a forum sponsor, makes some nice custom mats. I left the gooey mats in and put carpet on top to reduce road noise and keep heat down. There are threads here about it. Do a search.