I really doubt their cotton candy is just cotton candy, they blend it with something(s) else. I've tried to make standalone cotton candy's and its crap. 10%, 5%, 3% all turn into syrup. I make my wife's CC using a mild
tobacco base. 4% Hangsen desert ship and 1% cotton candy. It does steep for a few weeks but thats cause I make it ahead for her and never tried it "green" as-per-say. I wouldn't advise any heat steeping cause you'll just accelerate the syrup process and/or begin to caramelize the sweetener.
My best opinion is to
buy the CC concentrate
(Signature Circus Cotton Candy from ecig express) is the one my wife loves then using a diluted mild tobacco or whatever other flavor thats kinda bland, add the CC till you like the taste(1-2% of the volume of the juice), it means stepping abit into DIY but IMO you'll get a much better end result than doing what I did spending all kinds of money buying commercial juices to find a CC that was actually decent but really never did.