diff --git a/code/game/objects/structures/shower.dm b/code/game/objects/structures/shower.dm
index 3bcda940858..ef58ece3d7a 100644
--- a/code/game/objects/structures/shower.dm
+++ b/code/game/objects/structures/shower.dm
@@ -4,6 +4,7 @@
 #define SHOWER_NORMAL_TEMP 300
 #define SHOWER_BOILING "boiling"
 #define SHOWER_BOILING_TEMP 400
+#define SHOWER_REACTION_MULTIPLIER 0.05
 
 
 /obj/machinery/shower
@@ -130,7 +131,7 @@
 		wash_atom(loc)
 		for(var/am in loc)
 			var/atom/movable/movable_content = am
-			reagents.expose(movable_content, TOUCH, 5) //There's not many reagents leaving the sink at once!
+			reagents.expose(movable_content, TOUCH, SHOWER_REACTION_MULTIPLIER) //There's not many reagents leaving the sink at once! This should make for a 10 unit reaction
 			if(!ismopable(movable_content)) // Mopables will be cleaned anyways by the turf wash above
 				wash_atom(movable_content)
 	else
@@ -192,3 +193,5 @@
 	layer = FLY_LAYER
 	anchored = TRUE
 	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
+
+#undef SHOWER_REACTION_MULTIPLIER
diff --git a/code/modules/reagents/chemistry/holder.dm b/code/modules/reagents/chemistry/holder.dm
index 34ad6f1d160..8afea19a6bb 100644
--- a/code/modules/reagents/chemistry/holder.dm
+++ b/code/modules/reagents/chemistry/holder.dm
@@ -686,6 +686,12 @@
   * * [/datum/reagent/proc/expose_mob]
   * * [/datum/reagent/proc/expose_turf]
   * * [/datum/reagent/proc/expose_obj]
+  *
+  * Arguments
+  * - Atom/A: What mob/turf/object is being exposed to reagents? This is your reaction target.
+  * - Methods: What reaction type is the reagent itself going to call on the reaction target? Types are TOUCH, INGEST, VAPOR, PATCH, and INJECT.
+  * - Volume_modifier: What is the reagent volume multiplied by when exposed? Note that this is called on the volume of EVERY reagent in the base body, so factor in your Maximum_Volume if necessary!
+  * - Show_message: Whether to display anything to mobs when they are exposed.
   */
 /datum/reagents/proc/expose(atom/A, methods = TOUCH, volume_modifier = 1, show_message = 1)
 	if(isnull(A))