diff --git a/src/examples/subscriber/subscriber.cpp b/src/examples/subscriber/subscriber.cpp
index 3d54a1a2ff..a29f9ab934 100644
--- a/src/examples/subscriber/subscriber.cpp
+++ b/src/examples/subscriber/subscriber.cpp
@@ -36,7 +36,7 @@ void rc_channels_callback(const PX4_TOPIC_T(rc_channels) &msg) {
 	PX4_INFO("I heard: [%llu]", msg.timestamp_last_valid);
 }
 void rc_channels_callback2(const PX4_TOPIC_T(rc_channels) &msg) {
-	PX4_INFO("I heard(2): [%llu]", msg.timestamp_last_valid);
+	PX4_INFO("I heard (2): [%llu]", msg.timestamp_last_valid);
 }
 
 class RCHandler {
@@ -91,14 +91,7 @@ PX4_MAIN_FUNCTION(subscriber) {
 	 */
 	PX4_SUBSCRIBE(n, rc_channels, rc_channels_callback, 100);
 	PX4_SUBSCRIBE(n, rc_channels, rc_channels_callback2, 1000);
-	//1
-	// PX4_SUBSCRIBE(n, rc_channels, callee.rc_channels_callback, , 1000);
-	//2
-	// PX4_SUBSCRIBE(n, rc_channels, rchandler.callback, &rchandler, 1000);
-	//3 for bind
 	PX4_SUBSCRIBE(n, rc_channels, RCHandler::callback, rchandler, 1000);
-	// ros::NodeHandle n2;
-	// n2.subscribe("chatter", 1000, &RCHandler::callback, &rchandler);
 	PX4_INFO("subscribed");
 
 	/**