I have been trying to extend the working time of an essential oil blend in a lotion against mosquitos. I have been working with Vanillin, (dissolved in ethyl alcohol) and it has been giving me all kinds of emulsion grief. Just curious if anyone knew a good fixative for volatile essential oils (other than Vanillin)? I am about to pull my hair out with the Vanillin.....But dang...it works, if I can just keep the emulsion together. Added Carbomer in last two batches....and that seems to help (also use .2% X-gum and some stearic and propanediol). Was advised that good old e-wax....was the best emulsifier for tough emulsions? Had some Cyclomethicone in early batches...but removed from the last batch, wondering if that might challenge the emulsion? But mainly looking to extend the useful life of my EO's, beyond 18 minutes.