I freeze mine in an ice cube tray. Take out the number of cubes I need for one use, put them in a plastic bag, throw the bag at the bottom of shower and let them thaw while I am showering. This keeps it from going bad and I don't have to put cold product on my head.
Also, use about 3 times the amount you think you need. In my experience, more is better with FSG.
HTH.
CurlyFireHorse
Hair: 2a or 3a (not sure), very porous and fine as frog hair
Day 1: Cowash and condition with AO GPB, ACV Rinse,
Co-Kra gel (this stuff is fantastic)

Day 2: KCKT, KCCC, plop, KCCC, plop again, air dry
Day 3: Curly Kinks Satin Roots, Coil Jam
Day 4: IAGirl's PT, KBB DT, FSG

Co-Kra gel is my own concoction of okra boiled in coconut milk. It is a cross between FSG and KCCC and leaves my hair very soft and shiny