Biotene PBF Plaque Dissolving Dry Mouth Mouthwash - 16 oz

Would you rinse before or after brushing? Or both?

This is double the price of what this costs at almost any store (for the same size bottle). Is there a reason for this?

Does this burn like Listerine does? Bottle states mild, but one review said strong / bad taste.

Is this mint flavored? Ingredients just say "flavor". Dentist recommended it for my husband but he has a mint allergy.