Mediterranean Fig Fragrance Oil?

why use acetone in the mix and how much exactly do i need to use for 16oz iso alcohol ? what does the acetone do? In ashleigh and burwood black raspberry the ingredients is 90% iso alcohol and trimethylcyclohexa

I have been using 99% iso alcohol which i find is better than 91% but i still have problems with keeping the stone hot. I have soaked the wick in clean iso alcohol and even tried out the wick before going again and i have stuck to 10 drops of essential oil and although i do get a fragrance its not as nice smelling as the proper lamp oil ?? I get a better fragrance from essential oils when used in my oil burner oppose to using in the catalytic lamp in my case i have ashleigh and burwood lamps.
It is very hard to make and gaurantee a home made fuel that smells nice and stays lit when using essential oils and ipa rubbing alcohol like 91% or even 99%. There is the awful smell of alcohol when burning the lamp and thats if the stone stays hot and then the essential oil can smell not so nice. I love my lamps very much and its a real shame the companies that make lamp oil are so damn expensive? The cheapest company i have found in the UK is Prima lamp oil and they sell on ebay and they have there own website www.primafragrance.com/ but then its expensive if you like to burn as much as i do!
There must be someone out there who can tell us exactly what oils to buy and how to make up the oil lamp mix oppose to essential oil and iso alcohol? There must be more to it than that!