How to sanitize "Ammonia Badge" after it has been in a hospital tank

[lyscer]

Just as the title states, I am trying to figure out the best way to sanitize my ammonia badge. I thought I had read somewhere that it should not be left out to dry so I currently have it sitting in ro water (no salt). I just want to make sure that I don't reintroduce a disease if I put it back into a QT tank.

Thanks!

 

[Humblefish]

Rinse it with RODI (no chemicals), and then let it air dry for at least a week (to kill any cysts that might be on it.)