The unfortunate answer is, you're not going to know.  It depends on the concentration you did use, and how actively potent the fumes are.  If it still smells of bleach you did use to much.  Is it enough of a concentration to do harm... no way too know.  If you get  a dismal hatch, then probably.
If you use bleach you have to use it in the proper concentration, rinse thoroughly and allow any excess to denature, whether in the sun or not.  A continued odor means you didn't let the bator completely dry out, or the chlorine would have neutralized.  
Closing a still damp, chlorinated bator does perpetuate the chlorine for slightly longer.  It is exposure to additional air flow that dissipates the chlorine.
Chlorine is not a stabile chemical in liquid form.   It cannot be harbored in pores per se.  It will last until exposure to air, light/heat breaks it apart.  
Good luck.  It may not be a significant degree of chlorine gas you're smelling.  Next time, rinse well and REALLY let it dry before you close it.   I do put mine in the sun anything chlorine won't kill, the sun does.