Reddit:Electronics

This is the result of a 3% solution of Alconox and tap water for 20 min. at 40°C in an ultrasonic bath and it took this PCBA from trashed to clean. Second step was in 70% IPA and exercise buttons repeatedly, then blow dry and under a heat lamp. Note to others - take the battery out ASAP to minimize damage should your device take a caustic dip. This is a smart key that went for drink and sat for two weeks. The only thing on the other side is the battery holder.