diff --git a/src/baby_monitor/static/login.html b/src/baby_monitor/static/login.html
index 26fd923..bc89dfe 100644
--- a/src/baby_monitor/static/login.html
+++ b/src/baby_monitor/static/login.html
@@ -95,6 +95,23 @@
         showMessage("Your session has expired. Please log in again.", "error");
       }
 
+      // Clear user-specific cache data on login
+      function clearUserCache() {
+        const keysToRemove = [
+          'lastDiaperChildFilter',
+          'lastFeedingChildFilter',
+          'lastSleepChildFilter',
+          'lastDiaperTimeRange',
+          'lastFeedingTimeRange'
+        ];
+        
+        keysToRemove.forEach(key => {
+          localStorage.removeItem(key);
+        });
+        
+        console.log('Cleared user cache on login');
+      }
+
       form.addEventListener("submit", async (e) => {
         e.preventDefault();
 
@@ -118,9 +135,13 @@
 
           if (response.ok) {
             showMessage(data.message, "success");
+            
             // Store token in localStorage
             localStorage.setItem("access_token", data.access_token);
             localStorage.setItem("username", data.username);
+            
+            // Clear stale user preferences from previous sessions
+            clearUserCache();
 
             // Check for return URL parameter
             const params = new URLSearchParams(window.location.search);