next time, (besides using gloves for once) drop a blob of shellac on a shallow container with flexible sides (silicone or any flimsy bottle cap). After a few hours, take off gloves and thumbprint for several minutes with very light pressure on the blob of shellac. after another few hours, tie some nylon ties to the side of the container and tighten every now and then so that the end result is a convex plane with your finger prints. you want it slight convex but still mostly plane.

Done. now wait for that to dry. apply some harder finishing synthetic laqueur to preserve it longer. just keep that in your pocket and you will be able to unlock most phones.

note that some phones (correctly) do not mirror your prints, thought most do for some reason... for those you will have to first cast you prints and then cast the reusable token. which make getting a convex token in the end easier tho... but for the dozen of devices i've tested, they all mirror just fine.

... and that's reason #1239090 why using biometrics as passwords are a really stupid idea. it's only good for convenience shortcuts, so fine on phones, bad on anything else.