I suggest you leave out the vanilla to start with. What will he say to vanilla smelling urine. You are correct about the type test you are taking. All you need to defeat those test is THC free water, LOL!!! As far as heating your sample, keeping it in your pants pocket will help. Indoors, in your pocket, the temp should be around 80. To raise it more, if you crotch it like I describe in the substitution guidelines, and use the old 'I can't go right now' excuse for about 20-30 minutes, you should be able to raise the temp to body temp in about 20-30 minutes. Then again, that time frame is for 2oz of urine. If you are only using 1oz or less, the time to heat it with your body heat would be less, maybe as little as 10-15 minutes. You'd have to practice to find out for sure, but that is where I'd start.
Hope that helps. N2