Some doctors have suggested that beard hair can be a bristly breeding ground for germs. “Beard hair; it’s coarser. It has the shape of a bayonet, a round, convexed bottom and then comes up the side to a point,” Carol Walker, a consultant trichologist at Birmingham Trichology Centre, told the U.K.'s Daily Mail. “The cuticles on the hair—which are like layers of tiles on a roof—trap the germs and grease."

Leo's beard does look particularly... Dirty.

Aren't their preparations to clean the beard?  Like dog shampoo?

Even normal shampoo will do. Or vinegar!

:)

If you're going for aromatics, why not lavender?  I would love a lavender-scented beard.

That sounds like a good call to me. Lavender is so calming!