diff --git a/app/src/main/java/club/clubk/ktag/bletool/ScannerActivity.kt b/app/src/main/java/club/clubk/ktag/bletool/ScannerActivity.kt
index ee890cf..5f340e3 100644
--- a/app/src/main/java/club/clubk/ktag/bletool/ScannerActivity.kt
+++ b/app/src/main/java/club/clubk/ktag/bletool/ScannerActivity.kt
@@ -47,6 +47,9 @@ class ScannerActivity : ComponentActivity() {
 
     @SuppressLint("MissingPermission")
     private fun startScanning() {
+        // Clear existing devices when starting a new scan.
+        scannedDevices.clear()
+
         val bluetoothManager = getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
         val scanner = bluetoothManager.adapter.bluetoothLeScanner ?: run {
             Log.e(TAG, "BLE scanning not supported")