Tinc benz is the company medics way of punishing bad foot admin
It works well but is very painful, once you have landed back on planet earth and stopped squealing it has sealed and hardened your blister skin.
Using a sterile hypodermic withdraw the serum from the blister and pop in the same amount of tinc.
Frowned upon nowadays but its very effective, along with hydrogen peroxide for tropical ulcers and potassium permanganate solution for killing all known feet germs dead (and leaving you with brown feet)
No doubt some one will come along and explain they are carcinogenic or destructive.....But they work
Tinc benz will also stick ascherman chest seals to a wound more efficienctly