diff --git a/code/modules/mob/living/carbon/carbon.dm b/code/modules/mob/living/carbon/carbon.dm
index f09d661b84e..6874f3b7eba 100644
--- a/code/modules/mob/living/carbon/carbon.dm
+++ b/code/modules/mob/living/carbon/carbon.dm
@@ -7,7 +7,7 @@
 	..()
 
 	// Increase germ_level regularly
-	if(germ_level < GERM_LEVEL_AMBIENT && prob(80))	//if you're just standing there, you shouldn't get more germs beyond an ambient level
+	if(germ_level < GERM_LEVEL_AMBIENT && prob(30))	//if you're just standing there, you shouldn't get more germs beyond an ambient level
 		germ_level++
 
 /mob/living/carbon/Move(NewLoc, direct)