Warm water and the green no scent shower soap. Always get that broadhead off and apart as dirt and blood will make some of them rust. Back in the 90's I used one Gold Tip arrow to kill 8 deer. #8 broke it as I did not get a full pass through. Those old Wasp Hammers were great, usually just dinging one blade as it went through the ribs. Used fresh replacement blades, spun and flexed arrow, shot my target a couple times to be sure it was on and back into the quiver it went. You can get water inside the shaft so make sure it gets dry. I will set an arrow outside in the sun for a day or you can blow dry it, but on med or low heat.