Just in case some weren’t sure, a good 6-8 hours of sleep is generally required for REM and a healthy dream-life.
Sorry if you hadn’t gotten around to reading The Epic of Gilgamesh, but it is a several thousand year old story, so the clause for SPOILER warnings has expired. Long story short, when you work super hard to find something, often times if you stop searching, you’ll find it. So, I’m applying a new rule… sleep > bin aural beats, cold medicine, audio suggestions, etc., when attempting to dream lucidly.
PS: Getting accustomed to melatonin and cold medicine is not good for the first night you decide to stop using both, you’ll get no rest.