diff --git a/src/features/achievements/achievement.tsx b/src/features/achievements/achievement.tsx
index 007dd0c..9bf454f 100644
--- a/src/features/achievements/achievement.tsx
+++ b/src/features/achievements/achievement.tsx
@@ -160,6 +160,9 @@ export function createAchievement<T extends AchievementOptions>(
 
         achievement.earned = earned;
         achievement.complete = function () {
+            if (earned.value) {
+                return;
+            }
             earned.value = true;
             const genericAchievement = achievement as GenericAchievement;
             genericAchievement.onComplete?.();
diff --git a/src/features/reset.ts b/src/features/reset.ts
index 2811ba8..2b31e64 100644
--- a/src/features/reset.ts
+++ b/src/features/reset.ts
@@ -1,8 +1,9 @@
 import type { OptionsFunc, Replace } from "features/feature";
 import { getUniqueID } from "features/feature";
 import { globalBus } from "game/events";
+import Formula from "game/formulas/formulas";
 import type { BaseLayer } from "game/layers";
-import type { NonPersistent, Persistent } from "game/persistence";
+import { NonPersistent, Persistent, SkipPersistence } from "game/persistence";
 import { DefaultValue, persistent } from "game/persistence";
 import type { Unsubscribe } from "nanoevents";
 import Decimal from "util/bignum";
@@ -61,7 +62,15 @@ export function createReset<T extends ResetOptions>(
 
         reset.reset = function () {
             const handleObject = (obj: unknown) => {
-                if (obj != null && typeof obj === "object") {
+                if (
+                    obj != null &&
+                    typeof obj === "object" &&
+                    !(obj instanceof Decimal) &&
+                    !(obj instanceof Formula)
+                ) {
+                    if (SkipPersistence in obj && obj[SkipPersistence] === true) {
+                        return;
+                    }
                     if (DefaultValue in obj) {
                         const persistent = obj as NonPersistent;
                         persistent.value = persistent[DefaultValue];
diff --git a/src/game/persistence.ts b/src/game/persistence.ts
index 712f989..a61d9cf 100644
--- a/src/game/persistence.ts
+++ b/src/game/persistence.ts
@@ -9,6 +9,7 @@ import type { Ref, WritableComputedRef } from "vue";
 import { computed, isReactive, isRef, ref } from "vue";
 import player from "./player";
 import state from "./state";
+import Formula from "./formulas/formulas";
 
 /**
  * A symbol used in {@link Persistent} objects.
@@ -325,6 +326,7 @@ globalBus.on("addLayer", (layer: GenericLayer, saveData: Record<string, unknown>
                     }
                 } else if (
                     !(value instanceof Decimal) &&
+                    !(value instanceof Formula) &&
                     !isRef(value) &&
                     // eslint-disable-next-line @typescript-eslint/no-explicit-any
                     !features.includes(value as { type: typeof Symbol })