Tide, Think Tide. It cuts grease really well.
Go back to all of the old Tide jokes. There is some truth in them. The stuff works!
I have washed out entire trucks with the stuff, and it works. Remove all carpets. Put them all over a pole that is placed across two ladders. Wet the carpets well. Soak them with liquid Tide. Use the unscented type liquid detergent. Put the soap in a garden spray pump spray container and spray liberally. Mix the soap in a ratio of about 5-1 with water. Soak the carpet. Then rinse with a hose. Keep rinsing until little or no foam comes out with the rinse water. This will take some time. Think in terms of two to four beers. You are not in a hurry. Keep rinsing until you are sure that most of the soap is removed. Then place the carpet in the sun until it is 1/2 dry. While it is still wet, put the carpet in the truck. Bolt the seats back in and reassemble the interior. Leave the windows open and let it dry out. Put the carpet in its original places so that it fits where it should be. The carpet needs to be where it was meant to be, or it may get difficult for you.
I have bought a number of Toyos and have done this number on every one of them. A well seasoned car should have dirt, but the dirt should be my own dirt. I do not want to have other people's dirt in my truck. I always clean the carpets.
I do not just clean them, I remove them and wash them out. When I buy a truck, I remove the inside and clean it out. I wash the carpet and wipe the seats.
I am not so fastididous that I see germs. It is not like that. When I buy a truck, I want it to be cleaned of those who have gone before. I rarely buy a truck that is running as is. My usual purchase is not in running condition. When I bought my LC 80 it had bug problems. It was rolled, missing the front glass, and there were bugs in the teeth of anyone who drove it. The roof was crushed and it lacked a windshield. After straightening the roof, I cleaned the carpets. I also cleaned the headliner, it had some trans fluid on it. It is now the envy of the town where I live.
When you need to clean up your rig after any kind of mishap, including a roll, let me help. I know how to clean it up.