Water leak inside under the shifter console.

The evaporator and housing where all the heat exchange occurs for your AC is toward the middle of your dash, next to the glove box. It sounds entirely feasible that your drain tube is clogged and the water that normally drains out is backing up and leaking to your interior.

Can you fix it yourself? It depends how comfortable you are working with a few hand tools and getting the diagrams or information on the assemblies that you will need to take apart to fix it.

Also, there is the mold and mildew problem you have that will need to be addressed. Make sure you dry out the area that was affected completely or you might have further problems like rusting of the floor panels.

SCH-I535

 

I'd fix it or it will start to sell and create mold and stuff which is allergic and can be toxic. When you fix the leak clean the carpet with Clorox and let it dry very good with windows open

 

Avoid using chlorine bleach. It might bleach and discolor your carpeting.

SCH-I535

 

Dilute and test. You will need to kill the mold. Mild is highly toxic to the body.

 

Or just spray some Lysol on the affected carpet (test an area under a seat to be sure it won't discolor). I suggest you get the evap coils and chamber cleaned. Never use bleach or Lysol on the metal components of the coils (heater or evap) as it could damage them by corrosion.
Check out my recent maintenance cleaning the evap coils on my Prius using Kool-It:

http://priuschat.com/threads/strange-smell-from-vents.127834/page-3#post-1838480
Some shots of the evap coil thru the passenger's heater tube removed:


http://priuschat.com/threads/strange-smell-from-vents.127834/page-2#post-1834404

 

Steven
I'm having the exact same problem, and of course it is not under warranty. I hope we find some help from the group.

 

here is a product you can find at NAPA, supposedly. Good Luck....I'm going to try on mine when I find the product.