diff --git a/builtin-os-file-iter-byte.go b/builtin-os-file-iter-byte.go
index 1802112..f5f2c3d 100644
--- a/builtin-os-file-iter-byte.go
+++ b/builtin-os-file-iter-byte.go
@@ -59,8 +59,8 @@ func (it *fileFileByteIterator) Clean() (err error) {
 			it.reader = nil
 		}
 	}
-	it.reset()
-	it.b = 0
+	// it.reset()
+	// it.b = 0
 	return
 }
 
diff --git a/builtin-os-file-iter-line.go b/builtin-os-file-iter-line.go
index ca57e01..182d242 100644
--- a/builtin-os-file-iter-line.go
+++ b/builtin-os-file-iter-line.go
@@ -62,8 +62,8 @@ func (it *fileFileLineIterator) Clean() (err error) {
 			it.reader = nil
 		}
 	}
-	it.reset()
-	it.line = ""
+	// it.reset()
+	// it.line = ""
 	return
 }