diff --git a/BACKEND/app/services/line_connection.ts b/BACKEND/app/services/line_connection.ts
index 9702f03..cd8741e 100644
--- a/BACKEND/app/services/line_connection.ts
+++ b/BACKEND/app/services/line_connection.ts
@@ -94,6 +94,7 @@ export default class LineConnection {
       this.client.on('data', (data) => {
         if (this.connecting) return
         let message = data.toString()
+        let rawData = ''
         if (this.isRunningScript) {
           this.waitingScenario = true
           this.outputBuffer += message
@@ -111,9 +112,10 @@ export default class LineConnection {
             this.config.output = this.config.output.slice(0, -1)
             // message = message.slice(0, -1)
           } else {
-            this.config.output += cleanData(char)
+            rawData += char
           }
         }
+        this.config.output += cleanData(rawData)
         this.config.output = this.config.output.slice(-15000)
         this.socketIO.emit('line_output', {
           stationId,
diff --git a/BACKEND/app/ultils/helper.ts b/BACKEND/app/ultils/helper.ts
index 8523a5f..f32463c 100644
--- a/BACKEND/app/ultils/helper.ts
+++ b/BACKEND/app/ultils/helper.ts
@@ -7,12 +7,23 @@ import path from 'node:path'
  * @returns {string} - The cleaned data.
  */
 export const cleanData = (data: string) => {
-  return data
-    .replace(/--More--\s*BS\s*BS\s*BS\s*BS\s*BS\s*BS/g, '')
-    .replace(/\s*--More--\s*/g, '')
-    .replace(/\x1b\[[0-9;]*m/g, '') // Remove ANSI escape codes
-    .replace(/\x08/g, '')
-    .replace(/[^\x20-\x7E\r\n]/g, '') // Remove non-printable characters
+  return (
+    data
+      // 1️⃣ Xóa chuỗi "--More--" (Cisco/Unix pager)
+      .replace(/--More--[\s\x08\x1b\[K]*/g, '')
+
+      // 2️⃣ Xóa toàn bộ chuỗi ANSI escape sequences
+      //    Ví dụ: ESC[2J, ESC[K, ESC[?25h, ESC[0m, ...
+      .replace(/\x1B\[[0-9;?]*[A-Za-z]/g, '')
+
+      // 3️⃣ Xóa ký tự Backspace (BS) hoặc Delete (DEL)
+      .replace(/[\x08\x7F]/g, '')
+
+      // 4️⃣ Xóa ký tự NUL và các control char khác (trừ \r, \n, \t)
+      .replace(/[^\x09\x0A\x0D\x20-\x7E]/g, '')
+  )
+
+  // 5️⃣ Chuẩn hóa xuống dòng nếu cần
   // .replace(/\r\n/g, '\n')
 }