How to wash ISP ingress traffic?

Hello, i currently use DSCP Classify on OpenWrt 22.03.5 to mark my gaming traffic. DSCP Classify copies my egress prioritization dscp marks and reverses them for the ingress traffic, for that i have to disable the wash option in sqm cake which leads me to my problem -> My isp is sending me cs2, cs4 ,cs6 and "flowlabeled" marked packets and i dont know how to wash them before cake rechieves them.