Carefully try and get all the baking soda in the drain.
Pour 1/2 of the vinegar over the hole. So that the fizzes are forced down.
Then pour the other 1/2 of the vinegar down.
Wait 15 minutes then pour the boiling water down the drain. You may need to redo this step a few times.
If stubborn clog still exists, grab the plastic hair snake and place it in the drain, moving it around the inside edges of the drain. Pull out the snake and look in udder disgust of what game out.
Throw out in the trash.