The present invention provides a robust and efficient process for reducing the cloud point of biodiesel fuel in which clathrates are formed from saturated fatty acid components as solvent is evaporated from a mixture of urea, methanol and fatty acid esters. 1 \u03bcm or more and 5 \u03bcm or less, a porosity of 50% or more and 80% or less, and a thickness of 1 \u03bcm or more and 50 \u03bcm or less. An operation of the artificial lift device is then controlled responsive to the estimated attribute. Thereafter, an electro-optic medium placing process for forming an electro-optic droplet on each of the target regions is performed.