This is my understanding as well, I had watched how and why you use a fork to split them ,but could not tell where I had heard this ( I think it was on the Food Network)
What can you do with that wonderful container of corn starch ?
Use it to remove makeup off your face or even to just clean your face:
Mix 1 part cornstarch with 2 parts milk does a wonderful job and your face feels very soft
Clean Windows :
Mix 1 part cornstarch with 2 to 3 parts warm water...