Fixed an issue where boot/shoe overlays would magically be cleaned by putting in a knife and stepping on blood.

code/game/objects/effects/decals/Cleanable/humans.dm

@@ -53,7 +53,7 @@ var/global/list/image/splatter_cache=list()
 						blood_DNA |= B.blood_DNA.Copy()
 					qdel(B)
 	drytime = world.time + DRYING_TIME * (amount+1)
-	START_PROCESSING(SSobj, src)
+	START_PROCESSING(SSobj, src)
 
 /obj/effect/decal/cleanable/blood/process()
 	if(world.time > drytime)
@@ -93,7 +93,6 @@ var/global/list/image/splatter_cache=list()
 				S.overlays += S.blood_overlay
 			if(S.blood_overlay && S.blood_overlay.color != basecolor)
 				S.blood_overlay.color = basecolor
-				S.overlays.Cut()
 				S.overlays += S.blood_overlay
 			S.blood_DNA |= blood_DNA.Copy()
 			perp.update_inv_shoes()

code/modules/clothing/clothing.dm

@@ -502,6 +502,7 @@
 	if(usr.put_in_hands(holding))
 		usr.visible_message("<span class='danger'>\The [usr] pulls a knife out of their boot!</span>")
 		holding = null
+		overlays -= image(icon, "[icon_state]_knife")
 	else
 		usr << "<span class='warning'>Your need an empty, unbroken hand to do that.</span>"
 		holding.forceMove(src)
@@ -546,7 +547,6 @@
 	update_icon()
 
 /obj/item/clothing/shoes/update_icon()
-	overlays.Cut()
 	if(holding)
 		overlays += image(icon, "[icon_state]_knife")
 	if(ismob(usr))