I'm not aware of a single incident of anyone getting sick by smoking ( chemical free) unwashed buds. Happy for anyone to challenge that notion and prove me wrong!!! India, Afghanistan, Morocco etc etc have been growing and smoking cannabis for hundreds, maybe thousands of years. They make wonderful hashish in what the modern world may consider to be unsanitary conditions. Yet their hash looks, tastes and works wonderful. Dead skin particles, bugs, etc. are simply combusted in a bong or joint. It never hurt anyone. I cannot be convinced that bud washing does not dilute terpenes, and waters down the flavour of natural buds.