diff --git a/code/game/machinery/cloning.dm b/code/game/machinery/cloning.dm
index ba9b6fc225..f32772b600 100644
--- a/code/game/machinery/cloning.dm
+++ b/code/game/machinery/cloning.dm
@@ -163,15 +163,8 @@
 
 	H.hardset_dna(ui, se, H.real_name, null, mrace, features)
 
-	if(efficiency > 2)
-		var/list/unclean_mutations = (GLOB.not_good_mutations|GLOB.bad_mutations)
-		H.dna.remove_mutation_group(unclean_mutations)
-	if(efficiency > 5 && prob(20))
-		H.randmutvg()
-	if(efficiency < 3 && prob(50))
-		var/mob/M = H.randmutb()
-		if(ismob(M))
-			H = M
+	if(prob(50 - efficiency*10)) //Chance to give a bad mutation.
+		H.randmutb() //100% bad mutation. Can be cured with mutadone.
 
 	H.silent = 20 //Prevents an extreme edge case where clones could speak if they said something at exactly the right moment.
 	occupant = H