Its something I just tried today & it worked.

You all know that tip for trying to lucid dream is repeating to yourself before you go to sleep that ''I'm going to have a lucid Dream & recognise I'm dreaming''.

I switched it up & repeated over & over in my head was ''I am dreaming''. Simple as that I tricked my mind into saying this during one of my dreams without finding any dream signs. I quickly picked up on the echo in my head & said what do you know this is a dream im in.

But still to obatain full lucidity I ofcourse had to do a reality check. After I was successful with that, I began to used the dream control techniques I've learned.