Clean leathers?
I scrape the bugs off and occasionally rub in some dubbin. I do not have a beard but can still look like and smell like a tramp, but one of those sadly mentally ill ones that drinks floor cleaner and eats flies.
On a serious note, I find warm soapy water and then allow to dry in the air gets rid of most of the nasties. Once dry, a going over with leather food/dubbin makes them feel love and supple with out damaging their protection. My leather trousers are lined, but the lining does not come out so that needs a wash every now and again. The other thing I do is not wear them for anything other than riding my bike (despite what you may hear!). I also use leather dye for shoes on any places that start to fade. Strangely my left knee is starting to get a bit worn, so I may consider a pair of thicker knee patches at some point. Sowing them is hard work though and I blunted two leather needles this week when I had to replace one zip!
