:sadcatthumbsup:

code/game/objects/effects/chem/puddle.dm

@@ -22,8 +22,9 @@
 		CP.update_icon(TRUE)
 
 /obj/effect/decal/cleanable/chempuddle/proc/Spread(exclude=list())
-	if(!reagents && !QDELETED(src))
-		qdel(src)
+	if(!reagents)	// Destroy ourselves if we are an empty husk somehow.
+		if(!QDELETED(src))
+			qdel(src)
 		return
 
 	if(reagents.total_volume < (25 * reagents.get_viscosity())) return

code/game/objects/structures/watercloset.dm

@@ -267,7 +267,14 @@
 	reagents.splash(O, 10)
 
 /obj/machinery/shower/process()
+// A drain for every shower! ..If, there's a liquid on its turf.
+	var/obj/effect/decal/cleanable/chempuddle/to_drain = locate() in get_turf(src)
+	if(to_drain)
+		if(!QDELETED(to_drain))
+			qdel(to_drain)
+
 	if(!on) return
+
 	for(var/thing in loc)
 		var/atom/movable/AM = thing
 		var/mob/living/L = thing