How i fix my young living diffuser, why it broke... young living oil test!

Hi guys just want to share again my new YL diffuser and oil set that I got last October. Just a disclaimer, Im no essential oil expert so im basing this in my own personal opinion. I observed my new YL diffuser, not having molds, or residue so I thought of it why my old diffuser has it. Then I realize that I have used a lot of "alternative" essential oils, and maybe one of them includes adulterated or diluted oil combo thats why it left residues on my YL diffuser. Also I saw the paper test and tried it myself, I was really expecting that all oils leave a mark on the paper although many oils have different content. but I was pretty amaze on how potent the YL oils are yet very light and easily absorbed.