diff --git a/src/integrations/better-auth/header-user.tsx b/src/integrations/better-auth/header-user.tsx
index 95aa9bf..6242538 100644
--- a/src/integrations/better-auth/header-user.tsx
+++ b/src/integrations/better-auth/header-user.tsx
@@ -2,6 +2,8 @@ import { Link, useRouterState } from '@tanstack/react-router'
 import { useEffect, useRef, useState } from 'react'
 
 import { authClient } from '#/lib/auth-client'
+import { useBasket } from '#/lib/basket'
+import { clearGuestOrderRefs } from '#/lib/guestOrders'
 
 import styles from './header-user.module.scss'
 
@@ -63,6 +65,7 @@ const LogOutIcon = () => (
 
 const BetterAuthHeader = () => {
   const { data: session, isPending } = authClient.useSession()
+  const { clear: clearBasket } = useBasket()
   const [open, setOpen] = useState(false)
   const wrapperRef = useRef<HTMLDivElement>(null)
   const pathname = useRouterState({
@@ -145,6 +148,8 @@ const BetterAuthHeader = () => {
                 className={styles.menuButton}
                 onClick={() => {
                   setOpen(false)
+                  clearGuestOrderRefs()
+                  clearBasket()
                   void authClient.signOut()
                 }}
               >
diff --git a/src/lib/guestOrders.ts b/src/lib/guestOrders.ts
index 99c0f05..f1e4b8f 100644
--- a/src/lib/guestOrders.ts
+++ b/src/lib/guestOrders.ts
@@ -36,3 +36,11 @@ export const addGuestOrderRef = (ref: GuestOrderRef) => {
     // own link, it just won't show up in the local Orders list.
   }
 }
+
+export const clearGuestOrderRefs = () => {
+  try {
+    window.localStorage.removeItem(STORAGE_KEY)
+  } catch {
+    // Unavailable — nothing to clear.
+  }
+}