It's summer and I am not seeing the AC drain puddle in the garage. I am also now getting that musty smell coming out of the vents. For now it disappears but I have been thru this before on my 1st gen NX. Lysol + new cabin filter plus unclog the drain line is what's needed. Does anyone know where the AC drain line is located?

 

Should be on close to the front passenger side

 

Yes there was a small drip and I saw the tip of a white tube just under the front passenger side as you said. Thanks!

 

Not 100% sure but in order to help with avoiding the musty smell, try using the auto feature on your HVAC. I've looked through the manual, it also recommends to set it to bring in fresh air and not use recirculate. That being said when our temps are hovering around 30 + deg C I always use recirculate as it cools down the cabin more quickly and pulls out the humidity faster. On a short trip around town say a 20 minute drive and a high humidity level, I get a puddle spot around the size of a frying pan say 10-12" . I garage my car so the puddle doesn't dry up fast. But, I'm wondering if on a longer trip that gives the system more time to lower the humidity in the cabin if you would see only a small spot as it's already drained out the moisture a while ago. Just spit ballin here.