diff --git a/customer-display.php b/customer-display.php
index d9580e8..cd7aad6 100644
--- a/customer-display.php
+++ b/customer-display.php
@@ -137,8 +137,11 @@
         <div class="logo">
             <i class="bi bi-cart4 me-2"></i>Customer Display
         </div>
-        <div id="customerName" class="badge bg-light text-dark fs-6 fw-normal border">
-            Welcome
+        <div class="d-flex align-items-center">
+            <div id="debugInfo" class="me-3 badge bg-secondary" style="display: none;">Items: 0</div>
+            <div id="customerName" class="badge bg-light text-dark fs-6 fw-normal border">
+                Welcome
+            </div>
         </div>
     </div>
 
@@ -181,17 +184,29 @@
     </div>
 
     <script>
+        let lastTimestamp = 0;
+
         function formatMoney(amount) {
             return 'OMR ' + parseFloat(amount).toFixed(3);
         }
 
         function updateDisplay(data) {
+            if (!data) return;
+            lastTimestamp = data.timestamp || 0;
+
+            // Debug info
+            const debugEl = document.getElementById('debugInfo');
+            if (debugEl) {
+                debugEl.innerText = 'Items: ' + (data.items ? data.items.length : 0);
+                // debugEl.style.display = 'block'; // Uncomment to show always
+            }
+
             // Update Theme
             if (data.theme) {
                 document.body.className = data.theme;
             }
 
-            if (!data || !data.items || data.items.length === 0) {
+            if (!Array.isArray(data.items) || data.items.length === 0) {
                 document.getElementById('activeCart').style.display = 'none';
                 document.getElementById('welcomeScreen').style.display = 'flex';
                 document.getElementById('customerName').innerText = 'Welcome';
@@ -208,43 +223,67 @@
                 document.getElementById('customerName').innerText = 'Welcome';
             }
 
-            // Update Items
+            // Update Items (Safer rendering)
             const itemsList = document.getElementById('itemsList');
-            itemsList.innerHTML = data.items.map(item => `
-                <div class="cart-item">
-                    <div>
-                        <div class="item-name">${item.name}</div>
-                        <div class="item-details">
-                            ${item.qty} x ${formatMoney(item.price)}
-                        </div>
-                    </div>
-                    <div class="item-price">
-                        ${formatMoney(item.qty * item.price)}
-                    </div>
-                </div>
-            `).join('');
+            if (itemsList) {
+                itemsList.innerHTML = ''; // Clear existing
+                
+                data.items.forEach(item => {
+                    try {
+                        const row = document.createElement('div');
+                        row.className = 'cart-item';
+                        
+                        const name = item.name || 'Item';
+                        const price = parseFloat(item.price) || 0;
+                        const qty = parseFloat(item.qty) || 0;
+                        const total = price * qty;
 
-            // Scroll to bottom of list
-            itemsList.scrollTop = itemsList.scrollHeight;
+                        row.innerHTML = `
+                            <div>
+                                <div class="item-name"></div>
+                                <div class="item-details">
+                                    ${qty} x ${formatMoney(price)}
+                                </div>
+                            </div>
+                            <div class="item-price">
+                                ${formatMoney(total)}
+                            </div>
+                        `;
+                        // Set text content safely
+                        const nameEl = row.querySelector('.item-name');
+                        if (nameEl) nameEl.textContent = name;
+                        itemsList.appendChild(row);
+                    } catch (err) {
+                        console.error('Error rendering item:', err);
+                    }
+                });
+
+                // Scroll to bottom of list
+                requestAnimationFrame(() => {
+                     itemsList.scrollTop = itemsList.scrollHeight;
+                });
+            }
 
             // Update Totals
-            document.getElementById('displaySubtotal').innerText = formatMoney(data.subtotal);
+            document.getElementById('displaySubtotal').innerText = formatMoney(data.subtotal || 0);
             
-            if (data.discount > 0) {
+            const discount = parseFloat(data.discount) || 0;
+            if (discount > 0) {
                 document.getElementById('displayDiscountRow').style.display = 'flex';
-                document.getElementById('displayDiscount').innerText = '- ' + formatMoney(data.discount);
+                document.getElementById('displayDiscount').innerText = '- ' + formatMoney(discount);
             } else {
                 document.getElementById('displayDiscountRow').style.display = 'none';
             }
 
-            if (data.loyalty > 0) {
+            const loyalty = parseFloat(data.loyalty) || 0;
+            if (loyalty > 0) {
                 document.getElementById('displayLoyaltyRow').style.display = 'flex';
-                document.getElementById('displayLoyalty').innerText = '- ' + formatMoney(data.loyalty);
+                document.getElementById('displayLoyalty').innerText = '- ' + formatMoney(loyalty);
             } else {
                 document.getElementById('displayLoyaltyRow').style.display = 'none';
             }
 
-            document.getElementById('displayTotal').innerText = formatMoney(data.total);
+            document.getElementById('displayTotal').innerText = formatMoney(data.total || 0);
         }
 
         // Listen for storage events
@@ -259,6 +298,19 @@
             }
         });
 
+        // Polling fallback (every 1 second)
+        setInterval(() => {
+            const stored = localStorage.getItem('pos_cart_update');
+            if (stored) {
+                try {
+                    const data = JSON.parse(stored);
+                    if (data.timestamp && data.timestamp !== lastTimestamp) {
+                        updateDisplay(data);
+                    }
+                } catch (e) {}
+            }
+        }, 1000);
+
         // Initial check
         const stored = localStorage.getItem('pos_cart_update');
         if (stored) {
diff --git a/index.php b/index.php
index adee7c4..bf516fa 100644
--- a/index.php
+++ b/index.php
@@ -2868,7 +2868,7 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
             <div class="p-3 border-bottom d-flex justify-content-between align-items-center">
                 <h6 class="m-0 fw-bold"><i class="bi bi-cart3 me-2"></i>Cart</h6>
                 <div class="d-flex gap-2">
-                    <button class="btn btn-sm btn-outline-info" onclick="window.open('customer-display.php', 'CustomerDisplay', 'width=1000,height=800')" title="Customer Display"><i class="bi bi-display me-1"></i> Customer Screen</button>
+                    <button class="btn btn-sm btn-outline-info" onclick="window.open('customer-display.php?v=<?= time() ?>', 'CustomerDisplay', 'width=1000,height=800')" title="Customer Display"><i class="bi bi-display me-1"></i> Customer Screen</button>
                     <button class="btn btn-sm btn-outline-warning" onclick="cart.openHeldCartsModal()" title="Held List"><i class="bi bi-list-task"></i></button>
                     <button class="btn btn-sm btn-outline-secondary" onclick="cart.hold()" title="Hold Cart"><i class="bi bi-pause-circle"></i></button>
                     <button class="btn btn-sm btn-outline-danger" onclick="cart.clear()" title="Clear Cart"><i class="bi bi-trash"></i></button>
@@ -2968,7 +2968,10 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
         ?>,
         broadcast() {
             try {
-                const subtotal = this.items.reduce((sum, item) => sum + (parseFloat(item.price) * item.qty), 0);
+                // Ensure items is an array
+                if (!Array.isArray(this.items)) this.items = [];
+                
+                const subtotal = this.items.reduce((sum, item) => sum + (parseFloat(item.price) * parseFloat(item.qty)), 0);
                 let discountAmount = 0;
                 if (this.discount) {
                     discountAmount = this.discount.type === 'percentage' ? subtotal * (parseFloat(this.discount.value) / 100) : parseFloat(this.discount.value);
@@ -2983,14 +2986,14 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
 
                 const payload = {
                     items: this.items.map(i => ({
-                        name: (document.documentElement.lang === 'ar' ? (i.nameAr || i.nameEn) : (i.nameEn || i.nameAr)),
-                        price: parseFloat(i.price),
-                        qty: parseFloat(i.qty)
+                        name: (document.documentElement.lang === 'ar' ? (i.nameAr || i.nameEn) : (i.nameEn || i.nameAr)) || 'Unknown Item',
+                        price: parseFloat(i.price) || 0,
+                        qty: parseFloat(i.qty) || 0
                     })),
-                    subtotal: subtotal,
-                    discount: discountAmount,
-                    loyalty: loyaltyRedeemed,
-                    total: total,
+                    subtotal: parseFloat(subtotal) || 0,
+                    discount: parseFloat(discountAmount) || 0,
+                    loyalty: parseFloat(loyaltyRedeemed) || 0,
+                    total: parseFloat(total) || 0,
                     customerName: customerName,
                     theme: document.body.className,
                     timestamp: Date.now()