Dorito dust is flammable.
Both Dorito dust and the Dorito chips themselves are very flammable because Doritos are made with corn and oil, which are also hydrocarbons and starches, which make them great for starting fires with, especially when the Doritos are crushed into fine dust which increases the surface area for oxygen to fuel the combustion.
Doritos and Dorito dust work like a wick in an oil lamp, with the oil vaporizing and igniting easily and allows them to burn vigorously and support a flame.
Doritos and Dorito dust can easily be lit on fire as a result on fire as a result of their composition of corn starch vegetable oil, like hydrocarbons and flavorings, which makes the Doritos and Dorito dust excellent fire starters.
Doritos and Dorito dust can also sustain flames long enough to ignite kindling, which is similar to a fire starter log.
And the high oil content and large surface area of the Doritos from the ground corn create a combustible, energy rich fuel source which burns readily and hot.
Even Cheetos and many other chips can be flammable and catch on fire as well as they are fatty foods and contain hydrocarbons which both burn readily.