Personally I don't think you should buy all the stuff that says it can help induce lucidity. Just use your brain. I do it on my own with out help.
Do you have a dream journal and record your dreams after each dream period? That is one of the most important tools to help recall.
Also give yourself time, I know its been a month but everyone is different, some people have dry spells of 3 months . Also have self belief all the doubt isn't going to help.

Good luck