u/Background-Stable-72

Hey guys, I've had an uptick in requests from clients to refresh their stone beds this year. 10+yr old stone beds with dirt and sticks from broken down organic debris, some with much more variation in stone size than others. Up until this point our procedure has been removal and replacement. Is there something I am missing that I can do to reduce the price of the service by cleaning the stones?? I can't imagine it being worth the money after labor, but I wouldn't be too surprised if one of you had found a better way.
Thanks a lot folks