Klima Cleaener. This works great and is similar to the stuff in the video link above. You spray it thru the center vents in the car, but I have also sprayed it thru the drain tube from under the car. I have 2 more cans in the garage for the next time. You can also spray Lysol thru the outside vents at the windshield.
So i came across this forum after complaining to my dealer & corporate and getting the same answer. The problem is caused by a programming/design flaw. When starting the car it defaults to "air re-circulation mode" that, if not manually change to "outside air mode" each time before the car is turned off, can cause the air trapped inside the vents/tubes to become stale and moldy. I think this is completely unacceptable for a luxury car, but don't know what to do. I'll try this charcoal filter that people seem to talk about, if I don't have one already, and hoping the problem will die down with the heat in NY. I was told that if enough people complain to Lexus they can distribute a programming fix to dealers, but I'm not holding my breath.(pun intended). -Stinky.
What works for me is to turn off the AC about 5 minutes from your destination and keep the fan on med-high and set the air flow to outside and not recirc. It helps to dry out the moisture causing the mold growth. I live in a dry climate so not sure if it will work in a high humidity region.
Also rather than recirculate, having the AC on with outside air for two weeks can dissipate smells