diff --git a/pppr_cookie.php b/pppr_cookie.php
index d35c7d2..97eef1a 100644
--- a/pppr_cookie.php
+++ b/pppr_cookie.php
@@ -40,13 +40,14 @@ function set_pppr_cookie($is_local, $street_name, $house_number, $postcode, $cit
     $signature = hash_hmac('sha256', $data_string, WP_PPPR_SALT);
     $cookie_value = $data_string . "|" . $signature;
 
-    $is_secure = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off');
+    $cookie_domain = $_SERVER['SERVER_NAME'];
+    $is_secure = is_ssl(); 
 
     setcookie("PPPR", $cookie_value, [
         'expires' => time() + 7200,
         'path' => '/',
-        'domain' => $_SERVER['SERVER_NAME'],
-        'secure' => $is_secure,   // Only send over HTTPS
+        'domain' => $cookie_domain,
+        'secure' => $is_secure, 
         'httponly' => true, // Prevent JavaScript access
         'samesite' => 'Lax' // Protect against CSRF
     ]);
@@ -55,11 +56,38 @@ function set_pppr_cookie($is_local, $street_name, $house_number, $postcode, $cit
 function unset_pppr_cookie( $path = '/') {
     unset($_COOKIE["PPPR"]);
 
-    if (empty($domain)) {
-        setcookie("PPPR", '', time() - 3600, '/');
-    } else {
-        setcookie("PPPR", '', time() - 3600, '/' , $_SERVER['SERVER_NAME']);
+    $domain = $_SERVER['SERVER_NAME'];
+    $is_secure = is_ssl();
+
+    // 3. Send the delete command with ALL matching parameters
+    setcookie(
+        "PPPR", 
+        '', 
+        time() - 3600, 
+        '/', 
+        $domain, 
+        $is_secure, // Critical: Must match the 'secure' flag used when setting
+        true        
+    );
+}
+
+function update_expire_pppr_cookie() {
+    if (!isset($_COOKIE['PPPR'])) {
+        return false;
     }
+ 
+    $cookie_value = $_COOKIE['PPPR'];
+    $cookie_domain = $_SERVER['SERVER_NAME'];
+    $is_secure = is_ssl(); 
+
+    setcookie("PPPR", $cookie_value, [
+        'expires' => time() + 7200,
+        'path' => '/',
+        'domain' => $cookie_domain,
+        'secure' => $is_secure,
+        'httponly' => true, // Prevent JavaScript access
+        'samesite' => 'Lax' // Protect against CSRF
+    ]);
 }
 
 function verify_pppr_cookie_string() {