Safest way to store seedphrases?

​

Just got into BTC a couple months ago, and right now I have my seed phrase stamped on a metal plate stored in a home safe. My main worry is: what’s the absolute safest way to keep these words so no third party—like a thief, a family member, or even a contractor in the house—could ever get them? I’ve thought about splitting the phrase into parts and storing them in different locations (bank deposit box, relative’s house, etc.), but doesn’t that just create more points of failure or risk someone finding a partial phrase? Curious how you veterans handle this without overcomplicating things.