At work, we use a silicone mod release agent that is safe for use on things that will come into contact with food.
Vegetable oil and butter can go rancid, and generally have a taste. Most of the kitchen sprays are the same way. Food grade silicone lubes are probably your best bet.
If you don’t mind the flavor (of course i don’t because i’m a salt addict- roll it in a bowl of salt making sure some of the salt powder sticks, and it should lubricate fine.