My general guidelines, if you’re using 5 of 75, would be that, 1 spray AMMO and 4 of IO. The basic combo of 75 and IO is fun, I just use too much I-O for daily use. 75 always burns in four hours in my mix. I use a lot, because I always have to top up. It’s the effects of the electrical charges on these molecules. In this thread, M Harris is talking about how physicists (not just chemists) formulate fixative and diffusive molecule mixes. Now, the few people reading this who do mones professionally probably get at what I mean. I just don’t have the dual PhD’s required to fully understand it, but I respect people who do. You make the 75 burn faster with certain mix molecules. Years ago, Jasmin described 75 vs P79 and Van Der Waals forces. You can look at a 3-D software model of the charge shape of mones. It’s the charges that affect diffusion in mixes and stickiness of the molecule to skin, along with myriad other factors. Then there’s fluid mechanics as far as diffusion in the fluid atmosphere of mixed gasses in a room. Another PhD. One day, a clever dude will hack an e-cigarette and make a targeted mones diffuser…and make a million. Any engineers in the house?