Oh, I hate to do this 
Condensate is a natural phenomenon. When the vapor with a high moisture content (like the inside of an atomizer) contacts a cooler medium, the moisture (not necessarily water vapor) will condense into liquid. Hot vapor can hold a higher weight of liquid than cooler vapor. The wet vapor contacting the cooler surface produces visible condensate.
In order to develop visible condensate on the outside of an atty shell, hot wet vapor would have to come in contact with the cooler outside surface. Could happen, I guess.
It's quite obvious with the clear carto mods that have an internal surface exposed to the vapor coming off the heater. Condensate on the inside will happen. Not sure I like the idea of vaping "rerun juice" though.
Condensate is a natural phenomenon. When the vapor with a high moisture content (like the inside of an atomizer) contacts a cooler medium, the moisture (not necessarily water vapor) will condense into liquid. Hot vapor can hold a higher weight of liquid than cooler vapor. The wet vapor contacting the cooler surface produces visible condensate.
In order to develop visible condensate on the outside of an atty shell, hot wet vapor would have to come in contact with the cooler outside surface. Could happen, I guess.
It's quite obvious with the clear carto mods that have an internal surface exposed to the vapor coming off the heater. Condensate on the inside will happen. Not sure I like the idea of vaping "rerun juice" though.