I went on a mission a few years back to find my wife a cotton candy. It was a expensive journey buying random CC juices from vendors along with trying to find a decent tobacco vape for myself, ended up pretty well a failure. One that she didn't mind was cotton candy from JuiceMafia but at $25US per 100ml it was pricey, with exchange even pricier along with customs could snatch it anytime.
I went into DIY, first was to recreate a cotton candy for her. Bought several CC concentrates and began building standalones 15%, 10%, 5% all turned into syrup and were disgusting to say the least. It happened one night in a drunkin stooper I accidentally put my standalone cola into my atty of HS desert ship and it was real good for a green mix. I began experimenting mixing HS desert ship with other standalones and the flavors popped and were mighty good.
I began building mixes of Signature Circus Cotton Candy from ECX and HS desert ship. It took a few attempts but the inital OMG moment for her was 5% HS DS and 1.5% Circus CC...HAPPY WIFE, that was 2 years ago. I have since readjusted her mix to 4% desert ship and 3/4% CC and she's not noticed the drop in percentages. You can smell the cotton candy walking into the room she's vaping in. I have substituted HS Highway and she didn't notice the switch but HS No5 she did notice and asked me not to use it again. I even bait and switch with her old JuiceMafia juice(never again) and no comparison to my DIY CC.
I make her juice 200mls at a time, enough for a month so her juice steeps a month before its bottled and I repeat so she has juice ready when previous juice is gone.