Place liner in crockpot, folding excess top down over edges of ceramic crock.
Place bag of grits, water, and salt in crockpot.
Cook on high heat for 4 hours or low heat for 8 hours (or overnight).
Stir grits once cooked, add butter, and stir.
Add more salt, butter, or water, as needed to taste. Serve and enjoy!
Discard pot liner after use.