How do you spell decon?

The spelling of "decon" depends on what you mean. Here are a few possibilities:

* Decon (as a shortened version of "decontamination") is often used in the context of cleaning or sanitizing something.

* Decon could also be a shortened version of "deconstruct," meaning to analyze or break down something into its component parts.

Without more context, it's impossible to know the correct spelling.