Easy answer - TASER. See, some inmate in Florida got hosed with a petroleum based spray like LE-10, and then hit with a Taser, and he ignited. Oops. Thing is, this happened ONCE. I have personally seen inmates who were hosed with LE-10, and zapped, who just fell over, and one guy who proved to be immune to OC and Taser. (Yes, he was, took 4 shots, just made him madder than anything. He gave up because he was getting tired. I saw it.)
So, the Admin wet thier collective pants at the thought of a lawsuit from an inmate family over one of thier darlings doing the human torch impression, regardless of how incredibly unlikely it was to ever happen, and we dumped the LE-10 for the water based Sabre Red - a snake oil salesman inside the Dept arranged that one. Even the Technology Committee recognized later we "oopsed", but have to wait until the contract is over before we can replace the seasoning in a can with something a little bit better.
Sabre Red can work, but instead of a 1-2 second burst, it's a one to two can burst, to be effective. I can say it isn't very effective because we use it quite often, and the LE-10 was far better.