Control of a user device under wet conditions

A user device, comprising:

• a user interface that includes an ultrasonic sensor and a fingerprint scanner;
• one or more memories;
• and
• one or more processors communicatively coupled to the one or more memories, the one or more memories and the one or more processors configured to:
• determine whether the user device is potentially operating under a wet condition;
• configure, based at least in part on whether the user device is potentially operating under the wet condition, the ultrasonic sensor to receive an ultrasonic measurement to detect when a user is attempting to unlock the user device;
• determine that the ultrasonic measurement is received under the wet condition, and
• cause based at least in part on receiving the ultrasonic measurement indicating that the user is attempting to unlock the user device, the fingerprint scanner to enable an authentication process to be performed based at least in part on a scan of a finger of the user,
• wherein the fingerprint scanner is configured to perform the authentication process to permit an unlock operation of the user device to be performed under the wet condition.