This is what works for my smelly air conditioner in my LX 450. Turn air to outside circulate and blast on high for as long as it takes to make the smell go away (mine goes away in about 45 seconds). Supposed to dry up the smelly condensation that accumulated through the night. Also had the same problem with my old car, a Pontiac, and my mechanic said to find intake air area under passenger dash and spray a whole can of Lysol in it while air turned to high. Takes about 5 minutes of constant spraying, but it did the trick. I didn't want to spray my Lexus, so husband heard of the condensation problem fix and it worked for me.
