I have abused and soaked every model of Yubikey. I even melted the casings off every model with acetone to lookup chip specs and Yubico responded by switching t

I have abused and soaked every model of Yubikey. I even melted the casings off every model with acetone to lookup chip specs and Yubico responded by switching to a new unidentified glass hybrid compound no common solvents seem to impact. In all cases the Yubikeys still worked even as bare abused PCBs. You need a blowtorch or a drill to break one.