Yay a question just for me. Okay so you’re going to want to try a couple things. First give them a good spray of just regular Lysol or adjacent, the idea is first eliminating anything living that might grow back. The next is a product from Lincoln called EZ cleaner. Take the cleaner a few drops of a dish detergent and hot hot water and scrub it into every surface. Then take a rag to blot at the surface a bit. Once they are dry you’re going to take a similarly stiff dry brush and brush them all over with the intent of both making them fuzzy again as well as freeing the dirt that has come to the surface during the cleaning process.
If that didn’t work and it’s probable it won’t try a few more times. If that still won’t work you might need new Birks or perhaps have a cobbler like me replace the footbeds if you are particularly attached
Local law enforcement was having a training session very close by. That and the fact the shooter was the son of a Sherrif deputy are the reasons you could hear them blowing themselves over their fast response the whole time. Not that the fucker was putting up all the red flags for fucking years while being heavily involved in local law enforcement and constantly around guns.