Having had this happen to our hairy friend, this seems to work best, followed by a Dawn wash and rinse good, very good.

Dog smells OK. But a skunk burrowed his way from behind the house into the crawl space (footer is way too shallow, thanks to the "builder" who hacked this place together).
I suspect a possum found the burrow and had a disagreement with the skunk, because around 6 am today, the stench suddenly returned, stronger than ever.
Sigh.

The crawl space is so low that I can't get in it (and don't want to, in case I come face-to-face, or worse yet, face-to-butt, with a skunk!)
And it's impossible to completely block off from the half-basement due to the hack work where the ducts come through.

This article looks promising. https://www.instructables.com/id/How-to-Move-a-Skunk-Out-From-Under-Your-House/
My ex also trapped and relocated a skunk, and the mothballs kept it from coming back. Going to buy a box tomorrow!
I may leave the basement hatch open, and block the burrow with rocks, so they'll exit via the basement.

Right now I have the basement exhaust fan running (although I can't run the heat with a vacuum in the basement...)
The joys of country home ownership

Get a live trap and set it near where skunk is getting in. Bait with cat food. When you get the culprit throw an old blanket or other thick fabric item completely over the trap. Put in bed of truck, drive several miles away and release. When home set trap repeatedly to rid any other tenants. block hole with fencepost concrete bag mix.

Ugh. You have been having a rough week. Hope you are able to get I'm out of there...

My brother in law was having trouble with skunks destroying his lawn. So one morning he spots a skunk in the yard as he is leaving for work. Chases it through the yard with his Chevy Avalanche and...you guessed it: the skunk sprayed the truck at point blank. He worked in a small office building and had to park down the street and even after much power washing it was a couple weeks before he could park in his garage. Oh, and he couldn't turn on the climate control either.
Oops.

The funny thing about that is the skunk was actually doing him a favor. What it was doing was digging up some kind of grub that eats grass roots and kills patches of grass. Everybody thinks it's the skunk rooting up the lawn that causes those dead patches when it's actually the skunk's dinner that does the damage.

Kevin

That's my plan, except I am using cheap packaged honey buns. Apparently (from 2 reliable sources, one of who is an exterminator) skunks love those more than cat food or peanut butter. Haven't tried the moth balls yet.
Trap is out back, and I also set up a game cam watching the opening. Nothing in the trap this morning, and it's going to rain all day so Pepe Le Pew is probably dry and asleep and I don't feel like going out in the rain to get the memory card. But I'll sort him all right.

Got a good pic of the critter with the game cam. I'm not sure if it's a big rat or a possum, but it was tough enough to win a fight with a skunk even after getting hosed!
If it's a possum I'll leave it be, since they eat huge numbers of ticks and other pests.
But I do not need a rat condo in my crawl space.
What do you think it is?

That’s a rat. Definately NOT a opossum!!! opossums have long pointed snouts. Great pic BTW!