I had the same thing happen to my male dalmation. He took a dive fom the top of his aquarium for a cricket and filled his mouth with coco fiber.
Here's what I did...
I had a spare 10 gallon laying around I filled about an inch or two with water. Then I put him and splashed water all inside his mouth until most of it came out and he could finally close his mouth.
During his bath time (keep your hand in with it so he won't freak out and try to climb the glass) I changed all substrate to paper towel. Then I went and got the extra virgin olive oil from the kitchen cupboard and put it drop by drop on his nose while he licked it off. I fed him about a 1/4 of a teaspoon of olive oil.

That was 2 years ago. He's still alive and perfectly healthy.

I'm really sorry He passed :-(. But it sounds like he was impacted. I am not a vet and I did this only because I was very worried.

What is everyone elses opinions on what I did?