Dealing with rot

This is a C. mossiae coerulea that dropped a few leaves due to the evil known as propane.  Today I noticed some rot below the abscission point on one of the bulbs - whether this is connected to a dying leaf is hard to say.  In any case, to avoid the spread of these infections and death of the plant one has to undertake radical surgery.  I took a clean razor blade, sliced off the bulb well below the brown part, and then sprinkled cinnamon on the wound.  Cinnamon is known to have effective anti-microbial activity.